diff --git a/NEWS.md b/NEWS.md
index 5ed91cf198..cc35ad7334 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -18,7 +18,7 @@ The following bundled gems are promoted from default gems.
 * ostruct 0.6.1
 * pstore 0.1.4
 * benchmark 0.4.0
-* logger 1.6.5
+* logger 1.6.6
 * rdoc 6.12.0
 * win32ole 1.9.1
 * irb 1.15.1
diff --git a/gems/bundled_gems b/gems/bundled_gems
index 1e2c9dcf0f..bb8e756308 100644
--- a/gems/bundled_gems
+++ b/gems/bundled_gems
@@ -38,7 +38,7 @@ repl_type_completor 0.1.10  https://github.com/ruby/repl_type_completor
 ostruct             0.6.1   https://github.com/ruby/ostruct
 pstore              0.1.4   https://github.com/ruby/pstore b563c4d354615e12a6fa54ffaa4ed711c3d1ba9f
 benchmark           0.4.0   https://github.com/ruby/benchmark
-logger              1.6.5   https://github.com/ruby/logger
+logger              1.6.6   https://github.com/ruby/logger
 rdoc                6.12.0  https://github.com/ruby/rdoc
 win32ole            1.9.1   https://github.com/ruby/win32ole
 irb                 1.15.1  https://github.com/ruby/irb 6bb53630c3398b2042fb99d5232c68399491d338