diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 39f4dc0dc..14867c2dd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -73,7 +73,7 @@ jobs:
       matrix:
         os:
           - name: ubuntu
-            version: 24.04
+            version: 26.04
           - name: windows
             version: 2025-vs2026
         build_type:
@@ -89,13 +89,13 @@ jobs:
         compiler:
           - name: GCC
             toolset: gcc
-            version: 14
-            executable: g++-14
+            version: 15
+            executable: g++-15
             cxxflags: -fdiagnostics-color=always
           - name: Clang
             toolset: clang
-            version: 21
-            executable: clang++-21
+            version: 22
+            executable: clang++-22
             cxxflags: -stdlib=libc++ -fcolor-diagnostics
           - name: MSVC
             toolset: msvc
diff --git a/README.md b/README.md
index 0261749a8..169a49803 100644
--- a/README.md
+++ b/README.md
@@ -9,8 +9,8 @@ X4 scales from quick prototypes to production parsers for DSLs, data formats, an
 ### Supported Environments
 
 - C++23 and C++26
-- GCC 14
-- Clang 21
+- GCC 15
+- Clang 22
 - MSVC 2026
 
 ## How to use X4
diff --git a/modules/iris b/modules/iris
index 590e890ab..cbb3f57f6 160000
--- a/modules/iris
+++ b/modules/iris
@@ -1 +1 @@
-Subproject commit 590e890ab6ad91bacce59cf3d5310e9b72ac2579
+Subproject commit cbb3f57f6e141267e4955fcf98b8db27c2a2ee5b