diff --git a/util/version/Cargo.toml b/util/version/Cargo.toml
index 822ae0115..95fe5d8bd 100644
--- a/util/version/Cargo.toml
+++ b/util/version/Cargo.toml
@@ -16,9 +16,9 @@ track = "stable"
 # Latest supported fork blocks.
 # Indicates a critical release in this track (i.e. consensus issue).
 [package.metadata.networks]
-foundation = { forkBlock = 4370000, critical = false }
-ropsten = { forkBlock = 10, critical = false }
-kovan = { forkBlock = 6600000, critical = false }
+foundation = { forkBlock = 4370000, critical = true }
+ropsten = { forkBlock = 10, critical = true }
+kovan = { forkBlock = 6600000, critical = true }
 
 [dependencies]
 parity-bytes = { git = "https://github.com/paritytech/parity-common" }