diff --git a/Dockerfile b/Dockerfile
index 283eb41..90810c8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,7 @@ RUN export BUILD_DEPS="build-base \
 					    ruby-dev \
 					    libffi-dev \
 					    libtirpc-dev \
-					    imagemagick-dev
+					    imagemagick-dev \
 						cmake " \
 && apk add -U  ${BUILD_DEPS} \
 		   libressl \