1 files changed, 6 insertions, 1 deletions

diff --git a/README.md b/README.md
index 80fd678..0e95091 100644
--- a/README.md
+++ b/README.md
@@ -3,4 +3,9 @@
 This repostitory contains the gocryptfs website that is available at
 https://nuetzlich.net/gocryptfs .
 
-It is generated using mkdocs. On Debian Stretch: `pip3 install mkdocs`
+It is generated using mkdocs. Install using
+
+    pip3 install mkdocs==0.17.5
+
+Note: mkdocs 1.0 [crashes](https://travis-ci.org/rfjakob/gocryptfs-website/builds/456463957)
+with `Object of type 'Undefined' is not JSON serializable`.