diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index 722d06d89..d0cccc08e 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -632,6 +632,10 @@ letsencrypt==0.2.0
 # sha256: Cak7i4RaDsZixQMXWWpW-blTHaak09l94aLi9v7lljs
 letsencrypt-apache==0.2.0
 
+# sha256: uDndLZwRfHAUMMFJlWkYpCOphjtIsJyQ4wpgE-fS9E8
+# sha256: j4MIDaoknQNsvM-4rlzG_wB7iNbZN1ITca-r57Gbrbw
+mock==1.0.1
+
 UNLIKELY_EOF
     # -------------------------------------------------------------------------
     cat << "UNLIKELY_EOF" > "$TEMP_DIR/peep.py"
diff --git a/letsencrypt-auto-source/pieces/letsencrypt-auto-requirements.txt b/letsencrypt-auto-source/pieces/letsencrypt-auto-requirements.txt
index abdcd9d8d..bbda9f0b2 100644
--- a/letsencrypt-auto-source/pieces/letsencrypt-auto-requirements.txt
+++ b/letsencrypt-auto-source/pieces/letsencrypt-auto-requirements.txt
@@ -197,3 +197,7 @@ letsencrypt==0.2.0
 # sha256: AKuIT6b7gXXD2Cs7Qoem8ZrxcqBjABz1IgxhHGxmwX0
 # sha256: Cak7i4RaDsZixQMXWWpW-blTHaak09l94aLi9v7lljs
 letsencrypt-apache==0.2.0
+
+# sha256: uDndLZwRfHAUMMFJlWkYpCOphjtIsJyQ4wpgE-fS9E8
+# sha256: j4MIDaoknQNsvM-4rlzG_wB7iNbZN1ITca-r57Gbrbw
+mock==1.0.1