diff --git a/Dockerfile.agnos b/Dockerfile.agnos
index fdf38ba..51a235a 100644
--- a/Dockerfile.agnos
+++ b/Dockerfile.agnos
@@ -201,6 +201,9 @@ RUN cd /usr/lib/gcc/arm-none-eabi/9.2.1 && \
     rm -rf arm/ && \
     rm -rf thumb/nofp thumb/v6* thumb/v8* thumb/v7+fp thumb/v7-r+fp.sp
 
+# for ECM LTE
+RUN apt install ppp
+
 # keep this last
 RUN ldconfig