diff --git a/src/constants.ts b/src/constants.ts
index ed23790..e1ee23a 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -70,7 +70,7 @@ export const GEMINI_CLI_ENDPOINT = ANTIGRAVITY_ENDPOINT_PROD;
  */
 export const ANTIGRAVITY_DEFAULT_PROJECT_ID = "rising-fact-p41fc";
 
-export const ANTIGRAVITY_VERSION_FALLBACK = "1.18.3";
+export const ANTIGRAVITY_VERSION_FALLBACK = "1.19.4";
 let antigravityVersion = ANTIGRAVITY_VERSION_FALLBACK;
 let versionLocked = false;