diff --git a/backend/src/Vocabulary/TextStack.Vocabulary/DistractorGenerator.cs b/backend/src/Vocabulary/TextStack.Vocabulary/DistractorGenerator.cs
index 739b62d7..c67eb8f0 100644
--- a/backend/src/Vocabulary/TextStack.Vocabulary/DistractorGenerator.cs
+++ b/backend/src/Vocabulary/TextStack.Vocabulary/DistractorGenerator.cs
@@ -49,6 +49,7 @@ private static (string System, string User) BuildPrompt(
         parts.Add("- Similar difficulty level");
         parts.Add("- NOT synonyms");
         parts.Add("- Could plausibly confuse a learner");
+        parts.Add("- SINGLE WORD ONLY — no spaces, no multi-word phrases (use \"linearizability\" not \"strong consistency\"; \"sharding\" not \"data partitioning\"). Hyphens are fine.");
         parts.Add("");
         parts.Add("Task 2 - Hint: Write ONE short sentence (under 15 words) describing what this word means.");
         parts.Add($"Do NOT use the word \"{word}\" or direct synonyms in the hint.");
diff --git a/docker-compose.yml b/docker-compose.yml
index 7abbaf79..51d54bb1 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -145,7 +145,7 @@ services:
       - "127.0.0.1:81:81"  # Only localhost - not exposed to internet
     restart: always
     healthcheck:
-      test: ["CMD-SHELL", "wget -qO- http://localhost:81/ > /dev/null || exit 1"]
+      test: ["CMD-SHELL", "wget -qO- http://127.0.0.1:81/ > /dev/null || exit 1"]
       interval: 30s
       timeout: 5s
       retries: 3