diff --git a/.dockerignore b/.dockerignore
index 44d2407..bd84f89 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -14,3 +14,6 @@ src/xmcp/_version.py
 *.egg-info/
 build/
 dist/
+
+# Never ship git credentials into the builder
+.git/config