diff --git a/dockerfile b/dockerfile
index 6ab72e8..d4aaa89 100644
--- a/dockerfile
+++ b/dockerfile
@@ -19,7 +19,6 @@ RUN apt-get install -y \
     libmcrypt-dev \
     libreadline-dev \
     libfreetype6-dev \
-    oniguruma \
     g++
 
 # 2. apache configs + document root