diff --git a/rebar.config b/rebar.config
index 8977b9c..43c930b 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,10 +1,11 @@
-{minimum_otp_vsn, "22.0"}.
+{minimum_otp_vsn, "22.3"}.
 
-{erl_opts,
-    [warnings_as_errors,
-        {platform_define, "^2[2-5]{1}", if_check}]}.
+{erl_opts, [warnings_as_errors]}.
 
-{xref_checks, [undefined_function_calls,undefined_functions]}.
+{xref_checks,
+  [undefined_function_calls,undefined_functions,
+    locals_not_used,
+    deprecated_function_calls, deprecated_functions]}.
 
 {cover_excl_mods,
   [testutil,
@@ -25,7 +26,7 @@
  ]}.
 
 {deps, [
-  {lz4, ".*", {git, "https://github.com/martinsumner/erlang-lz4", {branch, "develop-3.1"}}},
+  {lz4, ".*", {git, "https://github.com/nhs-riak/erlang-lz4", {branch, "nhse-develop"}}},
   {zstd, ".*", {git, "https://github.com/nhs-riak/zstd-erlang", {branch, "nhse-develop"}}}
         ]}.
 
diff --git a/rebar3 b/rebar3
index a592824..2497f39 100755
Binary files a/rebar3 and b/rebar3 differ
diff --git a/src/leveled_pmanifest.erl b/src/leveled_pmanifest.erl
index 7f05122..3edf081 100644
--- a/src/leveled_pmanifest.erl
+++ b/src/leveled_pmanifest.erl
@@ -74,7 +74,7 @@
             % At o(10) trillion keys behaviour may become increasingly 
             % difficult to predict.
 
--ifdef(if_check).
+-if(OTP_RELEASE >= 25).
 -if(length(?LEVEL_SCALEFACTOR) /= ?MAX_LEVELS).
 -error("length ?LEVEL_SCALEFACTOR differs from ?MAX_LEVELS").
 -endif.