diff --git a/rebar.config b/rebar.config
index a5fbcdad0..4716a29da 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,4 +1,4 @@
-{minimum_otp_vsn, "21.0"}.
+{minimum_otp_vsn, "21.3"}.
 
 {deps,
  [{gproc, {git, "https://github.com/uwiger/gproc", {tag, "0.8.0"}}},