diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2b804a8bfa..7766d661b8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,7 +51,7 @@ jobs:
             nimflags-extra: --mm:refc
           - target:
               os: linux
-            builder: ['self-hosted','ubuntu-22.04']
+            builder: ['ubuntu-22.04']
           - target:
               os: macos
               cpu: amd64
@@ -215,7 +215,7 @@ jobs:
 
   devbuild:
     name: "Developer builds"
-    runs-on: ['self-hosted','ubuntu-22.04']
+    runs-on: ['ubuntu-22.04']
     steps:
       - name: Fix nim cache conflicts
         run: |
diff --git a/config.nims b/config.nims
index cef701a038..b6dce56db6 100644
--- a/config.nims
+++ b/config.nims
@@ -176,16 +176,17 @@ if canEnableDebuggingSymbols:
   # add debugging symbols and original files and line numbers
   --debugger:native
 
---define:nimOldCaseObjects # https://github.com/status-im/nim-confutils/issues/9
+#--define:nimOldCaseObjects # https://github.com/status-im/nim-confutils/issues/9
 
 switch("warningAsError", "BareExcept:on")
 switch("warningAsError", "CStringConv:on")
 switch("warningAsError", "UnusedImport:on")
+switch("warningAsError", "CaseTransition:on")
 switch("hintAsError", "ConvFromXtoItselfNotNeeded:on")
 switch("hintAsError", "DuplicateModuleImport:on")
 
 # `switch("warning[CaseTransition]", "off")` fails with "Error: invalid command line option: '--warning[CaseTransition]'"
-switch("warning", "CaseTransition:off")
+#switch("warning", "CaseTransition:off")
 
 #   1 nimbus-eth2/tests/consensus_spec/test_fixture_ssz_generic_types.nim(238, 28) Hint: 'sszCheck' cannot raise 'YamlConstructionError' [XCannotRaiseY]
 #   1 nimbus-eth2/tests/consensus_spec/test_fixture_ssz_generic_types.nim(238, 51) Hint: 'sszCheck' cannot raise 'YamlParserError' [XCannotRaiseY]
diff --git a/vendor/nim-confutils b/vendor/nim-confutils
index eec84f4b5e..792a92f85e 160000
--- a/vendor/nim-confutils
+++ b/vendor/nim-confutils
@@ -1 +1 @@
-Subproject commit eec84f4b5e8ea322f42b9c4008e549825c310a8d
+Subproject commit 792a92f85eecf59caf6957fdfeb6288c4abb0eea