diff --git a/letsencrypt-auto-source/letsencrypt-auto b/letsencrypt-auto-source/letsencrypt-auto
index 0ffe6c5f5..1ad11bf5f 100755
--- a/letsencrypt-auto-source/letsencrypt-auto
+++ b/letsencrypt-auto-source/letsencrypt-auto
@@ -1138,9 +1138,9 @@ parsedatetime==2.1 \
 pbr==1.8.1 \
     --hash=sha256:46c8db75ae75a056bd1cc07fa21734fe2e603d11a07833ecc1eeb74c35c72e0c \
     --hash=sha256:e2127626a91e6c885db89668976db31020f0af2da728924b56480fc7ccf09649
-pyOpenSSL==16.2.0 \
-    --hash=sha256:26ca380ddf272f7556e48064bbcd5bd71f83dfc144f3583501c7ddbd9434ee17 \
-    --hash=sha256:7779a3bbb74e79db234af6a08775568c6769b5821faecf6e2f4143edb227516e
+pyOpenSSL==18.0.0 \
+    --hash=sha256:26ff56a6b5ecaf3a2a59f132681e2a80afcc76b4f902f612f518f92c2a1bf854 \
+    --hash=sha256:6488f1423b00f73b7ad5167885312bb0ce410d3312eb212393795b53c8caa580
 pyparsing==2.1.8 \
     --hash=sha256:2f0f5ceb14eccd5aef809d6382e87df22ca1da583c79f6db01675ce7d7f49c18 \
     --hash=sha256:03a4869b9f3493807ee1f1cb405e6d576a1a2ca4d81a982677c0c1ad6177c56b \