diff --git a/lutron-cert/Dockerfile b/lutron-cert/Dockerfile
index 96ceee0..8e16fff 100644
--- a/lutron-cert/Dockerfile
+++ b/lutron-cert/Dockerfile
@@ -10,12 +10,24 @@ COPY requirements.txt /tmp/
 
 # Setup base
 RUN \
-    apk add --no-cache \
-        python3=3.6.8-r1 \
-        py3-cryptography=2.4.2-r2 \
+    apk add --no-cache --virtual .build-dependencies \
+        gcc=8.3.0-r0 \
+        libc-dev=0.7.1-r0 \
+        libffi-dev=3.2.1-r6 \
+        openssl-dev=1.1.1b-r1 \
+    \
+    && apk add --no-cache \
         dbus=1.10.24-r1 \
     \
-    && pip3 install --no-cache-dir -r /tmp/requirements.txt
+    && pip3 install --no-cache-dir -r /tmp/requirements.txt \
+    \
+    && find /usr/local \
+        \( -type d -a -name test -o -name tests -o -name '__pycache__' \) \
+        -o \( -type f -a -name '*.pyc' -o -name '*.pyo' \) \
+        -exec rm -rf '{}' + \
+    \
+    && apk del --purge .build-dependencies
+
 
 # Build arugments
 ARG BUILD_ARCH
diff --git a/lutron-cert/requirements.txt b/lutron-cert/requirements.txt
index deb9117..2bcd4ee 100644
--- a/lutron-cert/requirements.txt
+++ b/lutron-cert/requirements.txt
@@ -1,2 +1,3 @@
 requests==2.21.0
 Flask==1.0.2
+cryptography==2.6.1