diff --git a/requirements.txt b/requirements.txt
index 0f0223dab..fa3dba412 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,9 @@
 # https://github.com/bw2/ConfigArgParse/issues/17
 -e git+https://github.com/kuba/ConfigArgParse.git@python2.6#egg=ConfigArgParse
+
+# Support swig 3.0.5
+# https://github.com/M2Crypto/M2Crypto/issues/24
+# https://github.com/M2Crypto/M2Crypto/pull/30
+git+https://github.com/M2Crypto/M2Crypto/commit/d13a3a46c8934c5f50b31d5f95b23e6e06f845c3#egg=M2Crypto
+
 -e .