diff --git a/projects/ndpi/Dockerfile b/projects/ndpi/Dockerfile
index 3cf1cdc98..2cef81552 100644
--- a/projects/ndpi/Dockerfile
+++ b/projects/ndpi/Dockerfile
@@ -15,7 +15,7 @@
 ################################################################################
 
 FROM gcr.io/oss-fuzz-base/base-builder
-RUN apt-get update && apt-get install -y make autoconf automake autogen pkg-config libtool flex bison
+RUN apt-get update && apt-get install -y make autoconf automake autogen pkg-config libtool flex bison libjson-c-dev
 RUN git clone --depth 1 https://github.com/ntop/nDPI.git ndpi
 ADD https://www.tcpdump.org/release/libpcap-1.9.1.tar.gz libpcap-1.9.1.tar.gz
 COPY build.sh $SRC/