diff --git a/.github/scripts/create-values-diff.sh b/.github/scripts/create-values-diff.sh
index 8bed37353..76c22eafd 100755
--- a/.github/scripts/create-values-diff.sh
+++ b/.github/scripts/create-values-diff.sh
@@ -92,11 +92,17 @@ function generateComment() {
 
       mkdir "$originalResourcesDir" "$newResourcesDir"
 
-      "$SCRIPTS/templateGitHelmChart" -1 "$GITHUB_REPO_URL" "$chart" "${GITHUB_DEFAULT_BRANCH}" "$values" | yq -y -S >"$originalResourcesDir.yaml"
-      splitYamlIntoDir "$originalResourcesDir.yaml" "$originalResourcesDir"
+      (
+        "$SCRIPTS/templateGitHelmChart" -1 "$GITHUB_REPO_URL" "$chart" "${GITHUB_DEFAULT_BRANCH}" "$values" | yq -y -S >"$originalResourcesDir.yaml"
+        splitYamlIntoDir "$originalResourcesDir.yaml" "$originalResourcesDir"
+      ) &
+
+      (
+        "$SCRIPTS/templateLocalHelmChart" -1 "$chart" "$values" | yq -y -S >"$newResourcesDir.yaml"
+        splitYamlIntoDir "$newResourcesDir.yaml" "$newResourcesDir"
+      ) &
 
-      "$SCRIPTS/templateLocalHelmChart" -1 "$chart" "$values" | yq -y -S >"$newResourcesDir.yaml"
-      splitYamlIntoDir "$newResourcesDir.yaml" "$newResourcesDir"
+      wait
     ) &
   done
   wait
diff --git a/.github/scripts/templateHelmChart.sh b/.github/scripts/templateHelmChart.sh
index 47fd43163..fdfe4a3a2 100755
--- a/.github/scripts/templateHelmChart.sh
+++ b/.github/scripts/templateHelmChart.sh
@@ -24,7 +24,8 @@ function templateGitHelmRelease() {
     git checkout -q "$gitRef"
   ) >/dev/null
 
-  helm dependency update "$tmpDir/$gitPath" >/dev/null
+  source <(helm env)
+  flock --close "${HELM_REPOSITORY_CACHE}" helm dependency update "$tmpDir/$gitPath" >/dev/null
   helm template ${namespace:+--namespace "$namespace"} "$releaseName" "$tmpDir/$gitPath" --values <(if [[ -f "$values" ]]; then cat "$values"; else echo "$values"; fi)
 }