diff --git a/.ci/updatecli/updatecli-bump-kube-stack.yml b/.ci/updatecli/updatecli-bump-kube-stack.yml
index 935e5399aea..9901e613d79 100644
--- a/.ci/updatecli/updatecli-bump-kube-stack.yml
+++ b/.ci/updatecli/updatecli-bump-kube-stack.yml
@@ -41,7 +41,11 @@ sources:
     kind: file
     spec:
       file: "testing/integration/k8s/k8s.go"
-      matchpattern: 'KubeStackChartVersion\s*=\s"(.*)"'
+    transformers:
+      - findsubmatch:
+          pattern: 'KubeStackChartVersion\s*=\s*"(.*)"'
+          # This tells Updatecli to only keep the 1st capture group
+          captureindex: 1
 
 conditions:
   is-new-version:
@@ -60,7 +64,7 @@ targets:
     sourceid: opentelemetry-kube-stack-helm
     spec:
       file: "testing/integration/k8s/k8s.go"
-      matchpattern: '(KubeStackChartVersion\s*=\s)".*"'
+      matchpattern: '(KubeStackChartVersion\s*=\s*)".*"'
       replacepattern: '$1"{{ source "opentelemetry-kube-stack-helm" }}"'
 
   update-testdata: