diff --git a/conanfile.py b/conanfile.py
index d4425c0b..5a5a0986 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -59,7 +59,7 @@ class MPUnitsConan(ConanFile):
     }
     default_options = {
         "cxx_modules": False,
-        "use_fmtlib": True,
+        "use_fmtlib": False,
     }
     tool_requires = "cmake/[>=3.28.1]"
     exports = ["LICENSE.md"]
diff --git a/docs/getting_started/installation_and_usage.md b/docs/getting_started/installation_and_usage.md
index a17a4fce..8f470de9 100644
--- a/docs/getting_started/installation_and_usage.md
+++ b/docs/getting_started/installation_and_usage.md
@@ -185,7 +185,7 @@ tools.build:compiler_executables={"c": "gcc-12", "cpp": "g++-12"}
 
 [use_fmtlib](#use_fmtlib){ #use_fmtlib }
 
-:   [:octicons-tag-24: 2.2.0][use fmtlib support] · :octicons-milestone-24: `True`/`False` (Default: `True`)
+:   [:octicons-tag-24: 2.2.0][use fmtlib support] · :octicons-milestone-24: `True`/`False` (Default: `False`)
 
     Forces usage of [{fmt}](https://github.com/fmtlib/fmt) library instead of the C++20 Standard
     Library features.
@@ -232,7 +232,7 @@ tools.build:compiler_executables={"c": "gcc-12", "cpp": "g++-12"}
 
 [`MP_UNITS_USE_FMTLIB`](#MP_UNITS_USE_FMTLIB){ #MP_UNITS_USE_FMTLIB }
 
-:   [:octicons-tag-24: 2.2.0][use fmtlib support] · :octicons-milestone-24: `ON`/`OFF` (Default: `ON`)
+:   [:octicons-tag-24: 2.2.0][use fmtlib support] · :octicons-milestone-24: `ON`/`OFF` (Default: `OFF`)
 
     Forces usage of [{fmt}](https://github.com/fmtlib/fmt) library instead of the C++20 Standard
     Library features.
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 1665b352..d831a7f0 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -31,7 +31,7 @@ message(STATUS "${projectPrefix}BUILD_CXX_MODULES: ${${projectPrefix}BUILD_CXX_M
 option(${projectPrefix}AS_SYSTEM_HEADERS "Exports library as system headers" OFF)
 message(STATUS "${projectPrefix}AS_SYSTEM_HEADERS: ${${projectPrefix}AS_SYSTEM_HEADERS}")
 
-option(${projectPrefix}USE_FMTLIB "Enables usage of fmtlib instead of the 'std::format' facilities" ON)
+option(${projectPrefix}USE_FMTLIB "Enables usage of fmtlib instead of the 'std::format' facilities" OFF)
 message(STATUS "${projectPrefix}USE_FMTLIB: ${${projectPrefix}USE_FMTLIB}")
 
 list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")