diff --git a/.github/actions/v8-snapshot/action.yml b/.github/actions/v8-snapshot/action.yml
index d14966b2e..ff797abcb 100644
--- a/.github/actions/v8-snapshot/action.yml
+++ b/.github/actions/v8-snapshot/action.yml
@@ -10,6 +10,10 @@ inputs:
     description: 'OS used to select the v8 lib'
     required: false
     default: 'linux'
+  zig-v8:
+    description: 'zig-v8 release tag the prebuilt lib came from'
+    required: false
+    default: 'v0.4.7'
 
 runs:
   using: "composite"
@@ -19,7 +23,7 @@ runs:
       # snapshot.
     - name: V8 snapshot cache key
       id: snapshot_cache_key
-      run: echo "hash=v8-snapshot-${{ inputs.os }}_${{ inputs.arch }}-$(git log -n 1 --pretty=format:%H --
+      run: echo "hash=v8-snapshot-${{ inputs.os }}_${{ inputs.arch }}-${{ inputs.zig-v8 }}-$(git log -n 1 --pretty=format:%H --
                  src/browser/js/bridge.zig
                  src/browser/js/Snapshot.zig
                  src/browser/webapi