diff --git a/NEWS.md b/NEWS.md
index f0e2962696..3d884ac1d9 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -57,7 +57,7 @@ The following default gems are updated.
 * optparse 0.7.0.dev.2
 * prism 1.4.0
 * psych 5.2.3
-* stringio 3.1.6.dev
+* stringio 3.1.6
 * uri 1.0.3
 
 The following bundled gems are added.