diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c421ed2..ee980d9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        otp: [21.3.8.18, 22.0.7, 22.1.8, 22.2.8, 22.3.4.14, 23.0.4, 23.1.5.0, 23.2.1.0]
+        otp: [22.0.7, 22.1.8, 22.2.8, 22.3.4.14, 23.0.4, 23.1.5.0, 23.2.1.0]
     container:
       image: erlang:${{ matrix.otp }}-alpine
     steps:
diff --git a/rebar.config b/rebar.config
index a8f257e..64299cc 100644
--- a/rebar.config
+++ b/rebar.config
@@ -3,7 +3,7 @@
 
 {deps, [
 	{cut, "1.0.3"},
-	{ppp, {git, "git://github.com/travelping/ppp", {branch, "modernize"}}}
+	{ppplib, "1.0.0"}
 ]}.
 
 {minimum_otp_vsn, "21.3"}.