diff --git a/cmd/containerbuild/main.go b/cmd/containerbuild/main.go
index 18e879c..8d34a3a 100644
--- a/cmd/containerbuild/main.go
+++ b/cmd/containerbuild/main.go
@@ -30,7 +30,7 @@ func main() {
 
 	internal.InitSlog(*slogLevel)
 
-	koDockerRepo := strings.TrimRight(*dockerRepo, "/"+filepath.Base(*dockerRepo))
+	koDockerRepo := strings.TrimSuffix(*dockerRepo, "/"+filepath.Base(*dockerRepo))
 
 	if *githubEventName == "pull_request" && *pullRequestID != -1 {
 		*dockerRepo = fmt.Sprintf("ttl.sh/techaro/pr-%d/anubis", *pullRequestID)
diff --git a/docs/docs/CHANGELOG.md b/docs/docs/CHANGELOG.md
index e95e0c8..2ddda01 100644
--- a/docs/docs/CHANGELOG.md
+++ b/docs/docs/CHANGELOG.md
@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Developer documentation has been added to the docs site
 - Show more errors when some predictable challenge page errors happen ([#150](https://github.com/TecharoHQ/anubis/issues/150))
 - Verification page now shows hash rate and a progress bar for completion probability.
+- Use `TrimSuffix` instead of `TrimRight` on containerbuild
 
 ## v1.15.0