diff --git a/Makefile b/Makefile
index db72e3ee..0c15e0fc 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ COMPILE_FIRST = cowboy_middleware cowboy_stream cowboy_sub_protocol
 PLT_APPS = public_key ssl
 CT_OPTS += -ct_hooks cowboy_ct_hook [] # -boot start_sasl
 
-CI_OTP ?= OTP-18.0.3 OTP-18.1.5 OTP-18.2.4.1 OTP-18.3.4.4 OTP-19.0.7 OTP-19.1.4
+CI_OTP ?= OTP-18.0.3 OTP-18.1.5 OTP-18.2.4.1 OTP-18.3.4.4 OTP-19.0.7 OTP-19.1.5
 
 # Dependencies.