diff --git a/Dockerfile b/Dockerfile
index fde6122a..076e663a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -52,7 +52,7 @@ COPY --from=build-node /usr/local/src/recognizer /usr/local/src/recognizer
 WORKDIR /usr/local/src/recognizer
 
 RUN set -xe; \
-	mix phx.digest; \
+    mix phx.digest; \
     mix release
 
 # -----------------------------------------------