diff --git a/bin/steps/collectstatic b/bin/steps/collectstatic
index d99f021..755b927 100755
--- a/bin/steps/collectstatic
+++ b/bin/steps/collectstatic
@@ -11,7 +11,7 @@
 #   - $DEBUG_COLLECTSTATIC: upon failure, print out environment variables.
 
 # shellcheck source=bin/utils
-source $BIN_DIR/utils
+source "$BIN_DIR/utils"
 
 # Location of 'manage.py', if it exists.
 MANAGE_FILE=$(find . -maxdepth 3 -type f -name 'manage.py' -printf '%d\t%P\n' | sort -nk1 | cut -f2 | head -1)
diff --git a/bin/steps/pip-install b/bin/steps/pip-install
index f28a9f9..1589d87 100755
--- a/bin/steps/pip-install
+++ b/bin/steps/pip-install
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 # shellcheck source=bin/utils
-source $BIN_DIR/utils
+source "$BIN_DIR/utils"
 
 if [ ! "$SKIP_PIP_INSTALL" ]; then
 
diff --git a/bin/steps/pip-uninstall b/bin/steps/pip-uninstall
index cd97a8d..682b2c9 100755
--- a/bin/steps/pip-uninstall
+++ b/bin/steps/pip-uninstall
@@ -3,7 +3,7 @@
 set +e
 # Install dependencies with Pip.
 # shellcheck source=bin/utils
-source $BIN_DIR/utils
+source "$BIN_DIR/utils"
 
 if [ ! "$SKIP_PIP_INSTALL" ]; then
 
diff --git a/bin/steps/pipenv b/bin/steps/pipenv
index 59aab27..e7b2bd9 100755
--- a/bin/steps/pipenv
+++ b/bin/steps/pipenv
@@ -3,7 +3,7 @@
 # export CLINT_FORCE_COLOR=1
 # export PIPENV_FORCE_COLOR=1
 # shellcheck source=bin/utils
-source $BIN_DIR/utils
+source "$BIN_DIR/utils"
 set -e
 
 if [[ -f Pipfile.lock ]]; then