diff --git a/biweeklybudget/tests/docker_build.py b/biweeklybudget/tests/docker_build.py
index 15b869b..ffd1f35 100755
--- a/biweeklybudget/tests/docker_build.py
+++ b/biweeklybudget/tests/docker_build.py
@@ -93,7 +93,7 @@
 {copy}
 
 RUN /usr/local/bin/pip install virtualenv
-RUN /usr/local/bin/virtualenv /app
+RUN /usr/local/bin/virtualenv --system-site-packages /app
 RUN set -ex \
     && apk add --no-cache \
         fontconfig \
@@ -103,6 +103,7 @@
         libxslt-dev \
         tini \
         git \
+        py3-cryptography \
     && apk add --no-cache --virtual .build-deps \
         gcc \
         libffi-dev \
diff --git a/requirements.txt b/requirements.txt
index f9e9533..a268cb0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ babel==2.8.0
 beautifulsoup4==4.8.2
 cffi==1.15.1
 click==7.0
-cryptography==2.8
+cryptography
 datatables==0.4.9
 httplib2==0.17.0
 humanize==0.5.1