diff --git a/README.md b/README.md
index 0a90851..7c08a8d 100644
--- a/README.md
+++ b/README.md
@@ -106,9 +106,8 @@ Bugs, issues and contributions can be requested to both the mailing list or the
 ## Requirements & dependencies
 
 * Python v3+
-* six (required)
 * rfc6555 (required)
-* imaplib2 >= 2.57 (optional)
+* imaplib2 >= 3.5
 * gssapi (optional), for Kerberos authentication
 * portalocker (optional), if you need to run offlineimap in Cygwin for Windows
 
diff --git a/requirements.txt b/requirements.txt
index 1e2a2ae..9d575fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,4 @@
 # Requirements
-six
 gssapi[kerberos]
 portalocker[cygwin]
 rfc6555