diff --git a/Gemfile.lock b/Gemfile.lock
index 1f8064e62..104bc51af 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -476,7 +476,7 @@ GEM
       thor (>= 0.19.0, < 2.0)
     rainbow (3.0.0)
     rake (13.0.1)
-    rdf (3.1.5)
+    rdf (3.1.6)
       hamster (~> 3.0)
       link_header (~> 0.0, >= 0.0.8)
     rdf-normalize (0.4.0)