diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76e6fd3..b406ae3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 # Master
 
+- Typo fixes
+
 --------------------------------------------------------------------------------
 
 # 156 (2019-09-12)
diff --git a/bin/steps/pip-uninstall b/bin/steps/pip-uninstall
index 682b2c9..2e1ad8d 100755
--- a/bin/steps/pip-uninstall
+++ b/bin/steps/pip-uninstall
@@ -13,7 +13,7 @@ if [ ! "$SKIP_PIP_INSTALL" ]; then
 
 
     if ! pip-diff --stale requirements-declared.txt requirements.txt --exclude setuptools pip wheel > .heroku/python/requirements-stale.txt; then
-      mount "failure.bad-requirements"
+      mcount "failure.bad-requirements"
     fi
 
     rm -fr requirements-declared.txt
diff --git a/builds/heroku-18.Dockerfile b/builds/heroku-18.Dockerfile
index 6428fa6..7f0f942 100644
--- a/builds/heroku-18.Dockerfile
+++ b/builds/heroku-18.Dockerfile
@@ -1,4 +1,4 @@
-FROM heroku/heroku:18-build
+FROM heroku/heroku:18-build.v16
 
 WORKDIR /app
 ENV WORKSPACE_DIR="/app/builds" \