diff --git a/Dockerfile.template b/Dockerfile.template
index e6242a6..05f6d96 100644
--- a/Dockerfile.template
+++ b/Dockerfile.template
@@ -13,6 +13,8 @@ FROM resin/%%RESIN_MACHINE_NAME%%-debian
     python3-tk \
     python3-pip \
     python3-cffi \
+    libssl-dev \
+    libffi-dev \
     libfreetype6-dev \
     rpl \
     git \