diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,4 +41,4 @@ git+http://github.com/webpy/webpy@ace0f8
 https://github.com/drewp/cyclone/archive/python3.zip#egg=cyclone
 
 cycloneerr==0.3.0
-rdfdb==0.18.0
+rdfdb==0.19.0