diff --git a/Makefile b/Makefile
index 65de91eb..69b32935 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@ CT_OPTS += -ct_hooks cowboy_ct_hook [] # -boot start_sasl
 LOCAL_DEPS = crypto
 
 DEPS = cowlib ranch
-dep_cowlib = git https://github.com/ninenines/cowlib 2.8.0
+dep_cowlib = git https://github.com/ninenines/cowlib 2.9.0
 dep_ranch = git https://github.com/ninenines/ranch 1.7.1
 
 DOC_DEPS = asciideck
diff --git a/rebar.config b/rebar.config
index 4c5273cb..5fad0e88 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,4 +1,4 @@
 {deps, [
-{cowlib,".*",{git,"https://github.com/ninenines/cowlib","2.8.0"}},{ranch,".*",{git,"https://github.com/ninenines/ranch","1.7.1"}}
+{cowlib,".*",{git,"https://github.com/ninenines/cowlib","2.9.0"}},{ranch,".*",{git,"https://github.com/ninenines/ranch","1.7.1"}}
 ]}.
 {erl_opts, [debug_info,warn_export_vars,warn_shadow_vars,warn_obsolete_guard,warn_missing_spec,warn_untyped_record]}.