diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1d152114c..9b977aa05 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -31,10 +31,12 @@ linux-stable:
     - md5sum "parity_"$VER"_amd64.deb" > "parity_"$VER"_amd64.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/parity --body target/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/"parity_"$VER"_amd64.deb" --body "parity_"$VER"_amd64.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/"parity_"$VER"_amd64.deb.md5" --body "parity_"$VER"_amd64.deb.md5"
+    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=parity-builds-published; else export S3_BUCKET=parity-builds; fi
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/parity --body target/release/parity
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/parity.md5 --body parity.md5
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/"parity_"$VER"_amd64.deb" --body "parity_"$VER"_amd64.deb"
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/"parity_"$VER"_amd64.deb.md5" --body "parity_"$VER"_amd64.deb.md5"
   tags:
     - rust
     - rust-stable
@@ -96,6 +98,8 @@ linux-centos:
     - md5sum target/release/parity > parity.md5
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
+    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=parity-builds-published; else export S3_BUCKET=parity-builds; fi
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/x86_64-unknown-centos-gnu
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-centos-gnu/parity --body target/release/parity
     - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-centos-gnu/parity.md5 --body parity.md5
   tags:
@@ -126,10 +130,12 @@ linux-i686:
     - md5sum "parity_"$VER"_i386.deb" > "parity_"$VER"_i386.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/parity --body target/i686-unknown-linux-gnu/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/"parity_"$VER"_i386.deb" --body "parity_"$VER"_i386.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/"parity_"$VER"_i386.deb.md5" --body "parity_"$VER"_i386.deb.md5"
+    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=parity-builds-published; else export S3_BUCKET=parity-builds; fi
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/i686-unknown-linux-gnu
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/parity --body target/i686-unknown-linux-gnu/release/parity
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/parity.md5 --body parity.md5
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/"parity_"$VER"_i386.deb" --body "parity_"$VER"_i386.deb"
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/i686-unknown-linux-gnu/"parity_"$VER"_i386.deb.md5" --body "parity_"$VER"_i386.deb.md5"
   tags:
     - rust
     - rust-i686
@@ -166,10 +172,12 @@ linux-armv7:
     - md5sum "parity_"$VER"_armhf.deb" > "parity_"$VER"_armhf.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/parity --body target/armv7-unknown-linux-gnueabihf/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb" --body "parity_"$VER"_armhf.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb.md5" --body "parity_"$VER"_armhf.deb.md5"
+    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=parity-builds-published; else export S3_BUCKET=parity-builds; fi
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/parity --body target/armv7-unknown-linux-gnueabihf/release/parity
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/parity.md5 --body parity.md5
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb" --body "parity_"$VER"_armhf.deb"
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb.md5" --body "parity_"$VER"_armhf.deb.md5"
   tags:
     - rust
     - rust-arm
@@ -206,10 +214,12 @@ linux-arm:
     - md5sum "parity_"$VER"_armhf.deb" > "parity_"$VER"_armhf.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/parity --body target/arm-unknown-linux-gnueabihf/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb" --body "parity_"$VER"_armhf.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb.md5" --body "parity_"$VER"_armhf.deb.md5"
+    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=parity-builds-published; else export S3_BUCKET=parity-builds; fi
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/parity --body target/arm-unknown-linux-gnueabihf/release/parity
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/parity.md5 --body parity.md5
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb" --body "parity_"$VER"_armhf.deb"
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb.md5" --body "parity_"$VER"_armhf.deb.md5"
   tags:
     - rust
     - rust-arm
@@ -241,8 +251,10 @@ linux-armv6:
     - md5sum target/arm-unknown-linux-gnueabi/release/parity > parity.md5
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/parity --body target/arm-unknown-linux-gnueabi/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/parity.md5 --body parity.md5
+    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=parity-builds-published; else export S3_BUCKET=parity-builds; fi
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/parity --body target/arm-unknown-linux-gnueabi/release/parity
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/parity.md5 --body parity.md5
   tags:
     - rust
     - rust-arm
@@ -279,10 +291,12 @@ linux-aarch64:
     - md5sum "parity_"$VER"_arm64.deb" > "parity_"$VER"_arm64.deb.md5"
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity --body target/aarch64-unknown-linux-gnu/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/"parity_"$VER"_arm64.deb" --body "parity_"$VER"_arm64.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/"parity_"$VER"_arm64.deb.md5" --body "parity_"$VER"_arm64.deb.md5"
+    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=parity-builds-published; else export S3_BUCKET=parity-builds; fi
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity --body target/aarch64-unknown-linux-gnu/release/parity
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity.md5 --body parity.md5
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/"parity_"$VER"_arm64.deb" --body "parity_"$VER"_arm64.deb"
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/"parity_"$VER"_arm64.deb.md5" --body "parity_"$VER"_arm64.deb.md5"
   tags:
     - rust
     - rust-arm
@@ -304,8 +318,10 @@ darwin:
     - md5sum target/release/parity > parity.md5
     - aws configure set aws_access_key_id $s3_key
     - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/parity --body target/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/parity.md5 --body parity.md5
+    - if [[ $CI_BUILD_REF_NAME =~ ^(master|beta|stable)$ ]]; then export S3_BUCKET=parity-builds-published; else export S3_BUCKET=parity-builds; fi
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/x86_64-apple-darwin
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/parity --body target/release/parity
+    - aws s3api put-object --bucket $S3_BUCKET --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/parity.md5 --body parity.md5
   tags:
     - osx
   artifacts:
@@ -349,14 +365,17 @@ windows:
     - cd ..\..
     - aws configure set aws_access_key_id %s3_key%
     - aws configure set aws_secret_access_key %s3_secret%
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.exe --body target\release\parity.exe
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.exe.md5 --body target\release\parity.exe.md5
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.zip --body target\release\parity.zip
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.zip.md5 --body target\release\parity.zip.md5
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/InstallParity.exe --body nsis\InstallParity.exe
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/InstallParity.exe.md5 --body nsis\InstallParity.exe.md5
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/win-installer.zip --body nsis\win-installer.zip
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/win-installer.zip.md5 --body nsis\win-installer.zip.md5
+    - if "%CI_BUILD_REF_NAME% =~ ^(master|beta|stable)$" then (set S3_BUCKET=parity-builds-published) else (set S3_BUCKET=parity-builds)
+    - echo %S3_BUCKET%
+    - aws s3 rm --recursive s3://$S3_BUCKET/$CI_BUILD_REF_NAME/x86_64-pc-windows-msvc
+    - aws s3api put-object --bucket %S3_BUCKET% --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.exe --body target\release\parity.exe
+    - aws s3api put-object --bucket %S3_BUCKET% --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.exe.md5 --body target\release\parity.exe.md5
+    - aws s3api put-object --bucket %S3_BUCKET% --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.zip --body target\release\parity.zip
+    - aws s3api put-object --bucket %S3_BUCKET% --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.zip.md5 --body target\release\parity.zip.md5
+    - aws s3api put-object --bucket %S3_BUCKET% --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/InstallParity.exe --body nsis\InstallParity.exe
+    - aws s3api put-object --bucket %S3_BUCKET% --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/InstallParity.exe.md5 --body nsis\InstallParity.exe.md5
+    - aws s3api put-object --bucket %S3_BUCKET% --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/win-installer.zip --body nsis\win-installer.zip
+    - aws s3api put-object --bucket %S3_BUCKET% --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/win-installer.zip.md5 --body nsis\win-installer.zip.md5
   tags:
    - rust-windows
   artifacts:
@@ -394,7 +413,7 @@ test-rust-stable:
   image: ethcore/rust:stable
   before_script:
     - git submodule update --init --recursive
-    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only CI_BUILD_REF CI_BUILD_REF@{1} | grep \.js | wc -l)
+    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF CI_BUILD_REF@{1} | grep \.js | wc -l)
     - echo $JS_FILES_MODIFIED
     - if [ -z $JS_FILES_MODIFIED ]; then echo "skip js test"; fi
   script:
@@ -411,7 +430,7 @@ test-rust-beta:
   image: ethcore/rust:beta
   before_script:
     - git submodule update --init --recursive
-    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only CI_BUILD_REF CI_BUILD_REF@{1} | grep \.js | wc -l)
+    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF CI_BUILD_REF@{1} | grep \.js | wc -l)
     - echo $JS_FILES_MODIFIED
     - if [ -z $JS_FILES_MODIFIED ]; then echo "skip js test"; fi
   script:
@@ -429,7 +448,7 @@ test-rust-nightly:
   image: ethcore/rust:nightly
   before_script:
     - git submodule update --init --recursive
-    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only CI_BUILD_REF CI_BUILD_REF@{1} | grep \.js | wc -l)
+    - export JS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF CI_BUILD_REF@{1} | grep \.js | wc -l)
     - echo $JS_FILES_MODIFIED
     - if [ -z $JS_FILES_MODIFIED ]; then echo "skip js test"; fi
   script: