diff --git a/projects/yara/Dockerfile b/projects/yara/Dockerfile
index 25c91ff05..befe3d307 100644
--- a/projects/yara/Dockerfile
+++ b/projects/yara/Dockerfile
@@ -21,7 +21,9 @@ RUN \
   autoconf \
   make \
   libtool \
-  pkg-config
+  pkg-config \
+  bison \
+  flex
 
 RUN git clone --depth 1 https://github.com/VirusTotal/yara.git
 COPY build.sh $SRC/