diff --git a/Dockerfile b/Dockerfile
index 924f1fb..2b99a6f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,7 +19,6 @@ RUN apk update && \
     php5-mysql \
     php5-mysqli \
     php5-mcrypt \
-    php5-mbstring \
     php5-ctype \
     php5-zlib \
     php5-gd \