diff --git a/BaseLib/FileTools.cpp b/BaseLib/FileTools.cpp
index d591c095ecc8b04290e48d42bb8d07f8a7dfc1e4..fabf7b3da6579dbf57a2ae416c0cae5a29c4e848 100644
--- a/BaseLib/FileTools.cpp
+++ b/BaseLib/FileTools.cpp
@@ -14,7 +14,7 @@
 
 #include "FileTools.h"
 
-#include <spdlog/fmt/bundled/core.h>
+#include <fmt/core.h>
 
 #include <boost/algorithm/string/predicate.hpp>
 #include <filesystem>
diff --git a/GeoLib/AABB.h b/GeoLib/AABB.h
index 7fce1e79c74b59bb8ab2e1b37e9022f23eef8764..05840e63213d2a2ed18794cc71c108db30c3454b 100644
--- a/GeoLib/AABB.h
+++ b/GeoLib/AABB.h
@@ -14,7 +14,7 @@
 
 #pragma once
 
-#include <spdlog/fmt/bundled/ostream.h>
+#include <fmt/ostream.h>
 
 #include <Eigen/Core>
 #include <bitset>
diff --git a/ProcessLib/ThermoRichardsMechanics/ThermoRichardsMechanicsFEM-impl.h b/ProcessLib/ThermoRichardsMechanics/ThermoRichardsMechanicsFEM-impl.h
index a2c741b908051634781467748951e73d1b524fc4..d925a4bd769a467e49e9b2fa8c5ba611eb9ea4ab 100644
--- a/ProcessLib/ThermoRichardsMechanics/ThermoRichardsMechanicsFEM-impl.h
+++ b/ProcessLib/ThermoRichardsMechanics/ThermoRichardsMechanicsFEM-impl.h
@@ -11,7 +11,7 @@
 
 #pragma once
 
-#include <spdlog/fmt/ostr.h>
+#include <fmt/format.h>
 
 #include <Eigen/LU>
 #include <cassert>
diff --git a/Tests/MaterialLib/CheckStiffnessMatrixMFront.cpp b/Tests/MaterialLib/CheckStiffnessMatrixMFront.cpp
index 818d1c7bad1cfddadd7795e0897c25ea72b266a0..a6a9ff9d36b12c0089c9c848edfd0641635dbf0a 100644
--- a/Tests/MaterialLib/CheckStiffnessMatrixMFront.cpp
+++ b/Tests/MaterialLib/CheckStiffnessMatrixMFront.cpp
@@ -9,9 +9,9 @@
 
 #ifdef OGS_USE_MFRONT
 
+#include <fmt/format.h>
 #include <gmock/gmock-matchers.h>
 #include <gtest/gtest.h>
-#include <spdlog/fmt/ostr.h>
 
 #include "BaseLib/ConfigTree.h"
 #include "MaterialLib/SolidModels/MFront/CreateMFrontGeneric.h"