diff --git a/CMakeLists.txt b/CMakeLists.txt
index eb6fbed4..4f827370 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -229,7 +229,7 @@ elseif(${CMAKE_Fortran_COMPILER_ID} STREQUAL "NVHPC")
 endif()
 
 include(FetchContent)
-set(FORTIO_REF 4af4f714eecc1430879c95dd144f6ead229158ce CACHE STRING
+set(FORTIO_REF 11afd0bd1af0c99ea4e9a1c0df683dbdcc299b69 CACHE STRING
     "Fortio commit, tag, or branch used for the build")
 if(NOT TARGET fortio)
     FetchContent_Declare(
diff --git a/flake.lock b/flake.lock
index edd944b0..40a0d84f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -21,17 +21,17 @@
     "fortio": {
       "flake": false,
       "locked": {
-        "lastModified": 1787661850,
-        "narHash": "sha256-N19xpY6y8NtPvT7R+QI8EDEm+yrRNh4p6fjZK8zjrqQ=",
+        "lastModified": 1787669225,
+        "narHash": "sha256-53NhEp2KxhKs6So1UCTgphTuqqAx2XYRseRSvNHX3h8=",
         "owner": "lazy-fortran",
         "repo": "fortio",
-        "rev": "4af4f714eecc1430879c95dd144f6ead229158ce",
+        "rev": "11afd0bd1af0c99ea4e9a1c0df683dbdcc299b69",
         "type": "github"
       },
       "original": {
         "owner": "lazy-fortran",
         "repo": "fortio",
-        "rev": "4af4f714eecc1430879c95dd144f6ead229158ce",
+        "rev": "11afd0bd1af0c99ea4e9a1c0df683dbdcc299b69",
         "type": "github"
       }
     },
diff --git a/flake.nix b/flake.nix
index 4216dbe0..2704fc33 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,7 +5,7 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
     fortio = {
-      url = "github:lazy-fortran/fortio/4af4f714eecc1430879c95dd144f6ead229158ce";
+      url = "github:lazy-fortran/fortio/11afd0bd1af0c99ea4e9a1c0df683dbdcc299b69";
       flake = false;
     };
     fortnum = {
diff --git a/fpm.toml b/fpm.toml
index 55e605f5..eef8f62c 100644
--- a/fpm.toml
+++ b/fpm.toml
@@ -6,7 +6,7 @@ maintainer = "albert@tugraz.at"
 copyright = "Copyright 2025, Plasma Physics at TU Graz"
 
 [dependencies]
-fortio = { git = "https://github.com/lazy-fortran/fortio.git", rev = "4af4f714eecc1430879c95dd144f6ead229158ce" }
+fortio = { git = "https://github.com/lazy-fortran/fortio.git", rev = "11afd0bd1af0c99ea4e9a1c0df683dbdcc299b69" }
 fortnum = { git = "https://github.com/lazy-fortran/fortnum.git", rev = "62a559c0b8e1b28bd63550164a09ed9644e659b1" }
 
 [build]
diff --git a/tools/h5merge/CMakeLists.txt b/tools/h5merge/CMakeLists.txt
index 961a0f5f..788101f0 100644
--- a/tools/h5merge/CMakeLists.txt
+++ b/tools/h5merge/CMakeLists.txt
@@ -6,7 +6,7 @@ set(BUILD_TESTING OFF CACHE BOOL "Do not build dependency tests" FORCE)
 FetchContent_Declare(
   fortio
   GIT_REPOSITORY https://github.com/lazy-fortran/fortio.git
-  GIT_TAG 4af4f714eecc1430879c95dd144f6ead229158ce
+  GIT_TAG 11afd0bd1af0c99ea4e9a1c0df683dbdcc299b69
 )
 FetchContent_MakeAvailable(fortio)