diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 563fbda03..8252d0633 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -100,19 +100,6 @@ jobs:
         sudo apt-get -qq install libexpat1-dev libgd-dev libpam0g-dev \
                                  libsqlite3-dev libwebp-dev libyaml-dev
 
-    - name: Prepare rebar
-      run: |
-        echo '{xref_ignores, [{eldap_filter_yecc, return_error, 2}
-                             ]}.' >>rebar.config
-        echo '{xref_checks, [deprecated_function_calls, deprecated_functions,
-              locals_not_used, undefined_function_calls, undefined_functions]}.
-              % Disabled: exports_not_used,' >>rebar.config
-        echo '{dialyzer, [{get_warnings, true}, {plt_extra_apps, [cache_tab,
-              eimp, epam, esip, ezlib, fast_tls, fast_xml, fast_yaml,
-              mqtree, p1_acme, p1_mysql, p1_oauth2, p1_pgsql, p1_utils, pkix,
-              sqlite3, stringprep, stun, xmpp, yconf]} ]}.' >>rebar.config
-        echo "{ct_opts, [{keep_logs, 20}]}." >>rebar.config
-
     - name: Remove syntax_tools from release
       run: sed -i 's|, syntax_tools||g' src/ejabberd.app.src.script
 
diff --git a/.github/workflows/runtime.yml b/.github/workflows/runtime.yml
index e42908d22..a27203ba3 100644
--- a/.github/workflows/runtime.yml
+++ b/.github/workflows/runtime.yml
@@ -62,14 +62,6 @@ jobs:
         make update
         make
 
-    - name: Prepare rebar
-      run: |
-        echo '{xref_ignores, [{eldap_filter_yecc, return_error, 2}
-                             ]}.' >>rebar.config
-        echo '{xref_checks, [deprecated_function_calls, deprecated_functions,
-              locals_not_used, undefined_function_calls, undefined_functions]}.
-              % Disabled: exports_not_used,' >>rebar.config
-
     - run: make xref
 
     - name: Test rel (rebar2)
diff --git a/rebar.config b/rebar.config
index def6f349c..0f954ae85 100644
--- a/rebar.config
+++ b/rebar.config
@@ -174,7 +174,16 @@
 
 {xref_warnings, false}.
 
-{xref_checks, [deprecated_function_calls]}.
+{if_rebar3,
+ {xref_checks,
+  [deprecated_function_calls, deprecated_functions, locals_not_used,
+   undefined_function_calls, undefined_functions]}
+}.
+{if_not_rebar3,
+ {xref_checks,
+  [deprecated_function_calls, deprecated_functions,
+   undefined_function_calls, undefined_functions]}
+}.
 
 {xref_exclusions, [
                    "(\"gen_transport\":_/_)",
@@ -189,9 +198,27 @@
                    {if_var_false, sqlite, "(\"sqlite3\":_/_)"},
                    {if_var_false, zlib, "(\"ezlib\":_/_)"}]}.
 
+{xref_ignores, [{eldap_filter_yecc, return_error, 2} ]}.
+
 {eunit_compile_opts, [{i, "tools"},
                       {i, "include"}]}.
 
+{dialyzer, [{get_warnings, false}, % Show warnings of dependencies
+            {if_version_above, "25",
+             {plt_extra_apps,
+              [asn1, odbc, public_key, stdlib, syntax_tools,
+               eredis, idna, jiffy, luerl, jose,
+               cache_tab, eimp, epam, esip, ezlib, fast_tls, fast_xml, fast_yaml,
+               mqtree, p1_acme, p1_mysql, p1_oauth2, p1_pgsql, p1_utils, pkix,
+               sqlite3, stringprep, stun, xmpp, yconf]},
+             {plt_extra_apps, % For Erlang/OTP 25 and older
+              [cache_tab, eimp, epam, esip, ezlib, fast_tls, fast_xml, fast_yaml,
+               mqtree, p1_acme, p1_mysql, p1_oauth2, p1_pgsql, p1_utils, pkix,
+               sqlite3, stringprep, stun, xmpp, yconf]}
+            } ]}.
+
+{ct_opts, [{keep_logs, 20}]}.
+
 {cover_enabled, true}.
 {cover_export_enabled, true}.
 {coveralls_coverdata, "_build/test/cover/ct.coverdata"}.