diff --git a/corese-unit-test/src/test/resources/data/rdf-star-main/Gemfile.lock b/corese-unit-test/src/test/resources/data/rdf-star-main/Gemfile.lock
index 53732640d..8405f0dfb 100644
--- a/corese-unit-test/src/test/resources/data/rdf-star-main/Gemfile.lock
+++ b/corese-unit-test/src/test/resources/data/rdf-star-main/Gemfile.lock
@@ -66,7 +66,8 @@ GEM
       rdf (~> 3.1)
       rexml (~> 3.2)
     redcarpet (3.5.1)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     scanf (1.0.0)
     sparql (3.1.8)
       builder (~> 3.2)
@@ -80,6 +81,7 @@ GEM
     sparql-client (3.1.2)
       net-http-persistent (~> 4.0, >= 4.0.1)
       rdf (~> 3.1)
+    strscan (3.1.0)
     sxp (1.1.0)
       rdf (~> 3.1)
     temple (0.8.2)