diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 coloredlogs==6.0
-colormath==2.1.1
+colormath==3.0.0
 coverage==4.3.4
 cyclone==1.1
 faulthandler==2.6
@@ -33,4 +33,4 @@ typing==3.6.1
 watchdog==0.8.3
 web.py==0.38
 webcolors==1.7
-https://projects.bigasterisk.com/rdfdb/rdfdb-0.4.0.tar.gz
+https://projects.bigasterisk.com/rdfdb/rdfdb-0.5.0.tar.gz