diff --git a/.gremlins.yaml b/.gremlins.yaml
index 7a1872f..3c777aa 100644
--- a/.gremlins.yaml
+++ b/.gremlins.yaml
@@ -4,4 +4,6 @@ unleash:
   timeout-coefficient: 50
   
   workers: 4
-  dry-run: false
\ No newline at end of file
+  dry-run: false
+  threshold:
+    efficacy: 100
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 54c38ee..2ea9847 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ test-unit: ## Run unit tests with coverage
 	go test ./... -cover -v
 
 test-mutation: ## Run mutation tests with gremlins
-	gremlins unleash --threshold 1.0
+	gremlins unleash
 
 FUZZ_TIME ?= 30