diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index be8d50a4d80..f66752a4312 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -461,7 +461,7 @@ if [ "$1" = "--le-auto-phase2" ]; then
     # There is no $ interpolation due to quotes on starting heredoc delimiter.
     # -------------------------------------------------------------------------
     cat << "UNLIKELY_EOF" > "$TEMP_DIR/setuptools-requirements.txt"
-# cryptography requires a more modern version of setuptools
+# cryptography requires a more modern version of setuptools.
 # sha256: _ANFf7h6utSdwJ-cMTOGNpPn3bbKgrtQpzmnc3nOWpo
 # sha256: JPz8FTZKn-CaIg830tztyEl5Xj3j5LOT7piOZqnL2Fo
 # sha256: gJaELiTE8ddN_xKr6Qwm0S8F0NmlbtXgb8qm-qHkC2o
diff --git a/letsencrypt-auto-source/pieces/setuptools-requirements.txt b/letsencrypt-auto-source/pieces/setuptools-requirements.txt
index 9dcb95a4c7d..ab9d30da2bd 100644
--- a/letsencrypt-auto-source/pieces/setuptools-requirements.txt
+++ b/letsencrypt-auto-source/pieces/setuptools-requirements.txt
@@ -1,4 +1,4 @@
-# cryptography requires a more modern version of setuptools
+# cryptography requires a more modern version of setuptools.
 # sha256: _ANFf7h6utSdwJ-cMTOGNpPn3bbKgrtQpzmnc3nOWpo
 # sha256: JPz8FTZKn-CaIg830tztyEl5Xj3j5LOT7piOZqnL2Fo
 # sha256: gJaELiTE8ddN_xKr6Qwm0S8F0NmlbtXgb8qm-qHkC2o