diff --git a/certificate.cabal b/certificate.cabal
--- a/certificate.cabal
+++ b/certificate.cabal
@@ -1,5 +1,5 @@
 Name:                certificate
-Version:             1.3.8
+Version:             1.3.9
 Description:
     Certificates and Key reader/writer
     .
@@ -29,7 +29,7 @@
   Build-Depends:     base >= 3 && < 5
                    , bytestring
                    , mtl
-                   , pem >= 0.1 && < 0.2
+                   , pem >= 0.1 && < 0.3
                    , asn1-data >= 0.7.1 && < 0.8.0
                    , crypto-pubkey-types >= 0.4 && < 0.5
                    , cryptohash