diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index e48785066..3c3227b41 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -766,8 +766,8 @@ cffi==1.10.0 \
     --hash=sha256:285ab352552f52f1398c912556d4d36d4ea9b8450e5c65d03809bf9886755533 \
     --hash=sha256:5576644b859197da7bbd8f8c7c2fb5dcc6cd505cadb42992d5f104c013f8a214 \
     --hash=sha256:b3b02911eb1f6ada203b0763ba924234629b51586f72a21faacc638269f4ced5
-ConfigArgParse==0.10.0 \
-    --hash=sha256:3b50a83dd58149dfcee98cb6565265d10b53e9c0a2bca7eeef7fb5f5524890a7
+ConfigArgParse==0.12.0 \
+    --hash=sha256:28cd7d67669651f2a4518367838c49539457504584a139709b2b8f6c208ef339
 configobj==5.0.6 \
     --hash=sha256:a2f5650770e1c87fb335af19a9b7eb73fc05ccf22144eb68db7d00cd2bcb0902
 cryptography==2.0.2 \
diff --git a/letsencrypt-auto-source/pieces/dependency-requirements.txt b/letsencrypt-auto-source/pieces/dependency-requirements.txt
index 9f98c7520..4b3da685c 100644
--- a/letsencrypt-auto-source/pieces/dependency-requirements.txt
+++ b/letsencrypt-auto-source/pieces/dependency-requirements.txt
@@ -58,8 +58,8 @@ cffi==1.10.0 \
     --hash=sha256:285ab352552f52f1398c912556d4d36d4ea9b8450e5c65d03809bf9886755533 \
     --hash=sha256:5576644b859197da7bbd8f8c7c2fb5dcc6cd505cadb42992d5f104c013f8a214 \
     --hash=sha256:b3b02911eb1f6ada203b0763ba924234629b51586f72a21faacc638269f4ced5
-ConfigArgParse==0.10.0 \
-    --hash=sha256:3b50a83dd58149dfcee98cb6565265d10b53e9c0a2bca7eeef7fb5f5524890a7
+ConfigArgParse==0.12.0 \
+    --hash=sha256:28cd7d67669651f2a4518367838c49539457504584a139709b2b8f6c208ef339
 configobj==5.0.6 \
     --hash=sha256:a2f5650770e1c87fb335af19a9b7eb73fc05ccf22144eb68db7d00cd2bcb0902
 cryptography==2.0.2 \