diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 9f081d1..6d979f7 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -41,7 +41,7 @@ jobs:
       id: cache_key
       run: |
         cd scripts
-        python3 get_cache_key.py exiv2 || exit 1
+        python3 get_cache_key.py fmt exiv2 || exit 1
     - name: Cache
       id: cache
       uses: actions/cache@v4
@@ -52,6 +52,7 @@ jobs:
       if: steps.cache.outputs.cache-hit != 'true'
       run: |
         cp scripts/build_*.sh -v ./ || exit 1
+        ./build_fmt.sh || exit 1
         ./build_exiv2.sh || exit 1
     - name: Build
       run: |
@@ -137,7 +138,7 @@ jobs:
       id: cache_key
       run: |
         cd scripts
-        python3 get_cache_key.py exiv2 libzip x264 ffmpeg rapidjson || exit 1
+        python3 get_cache_key.py fmt exiv2 libzip x264 ffmpeg rapidjson || exit 1
     - name: Cache
       id: cache
       uses: actions/cache@v4
@@ -152,6 +153,7 @@ jobs:
       run: |
         export PKG_CONFIG_PATH=`pwd`/clib/lib/pkgconfig
         cp scripts/build_*.sh -v ./ || exit 1
+        ./build_fmt.sh || exit 1
         ./build_exiv2.sh || exit 1
         ./build_libzip.sh || exit 1
         ./build_x264.sh || exit 1
@@ -186,7 +188,7 @@ jobs:
       id: cache_key
       run: |
         cd scripts
-        python get_cache_key.py --prefix=win zlib pkgconf expat exiv2 openssl libzip x264 ffmpeg rapidjson || exit 1
+        python get_cache_key.py --prefix=win zlib pkgconf fmt expat exiv2 openssl libzip x264 ffmpeg rapidjson || exit 1
     - name: Cache
       id: cache
       uses: actions/cache@v4
@@ -223,6 +225,11 @@ jobs:
       run: |
         COPY /Y scripts\build_win_pkgconf.bat || exit 1
         CALL build_win_pkgconf.bat || exit 1
+    - name: Build fmt
+      if: steps.cache.outputs.cache-hit != 'true'
+      run: |
+        COPY /Y scripts\build_win_fmt.bat || exit 1
+        CALL build_win_fmt.bat || exit 1
     - name: Build expat
       if: steps.cache.outputs.cache-hit != 'true'
       run: |
diff --git a/.github/workflows/github-pages.yaml b/.github/workflows/github-pages.yaml
index f0136d3..e53fc01 100644
--- a/.github/workflows/github-pages.yaml
+++ b/.github/workflows/github-pages.yaml
@@ -58,7 +58,7 @@ jobs:
         id: cache_key
         run: |
           cd scripts
-          python3 get_cache_key.py exiv2 libzip x264 ffmpeg rapidjson || exit 1
+          python3 get_cache_key.py fmt exiv2 libzip x264 ffmpeg rapidjson || exit 1
       - name: Cache
         id: cache
         uses: actions/cache@v4
@@ -73,6 +73,7 @@ jobs:
         run: |
           export PKG_CONFIG_PATH=`pwd`/clib/lib/pkgconfig
           cp scripts/build_*.sh -v ./ || exit 1
+          ./build_fmt.sh || exit 1
           ./build_exiv2.sh || exit 1
           ./build_libzip.sh || exit 1
           ./build_x264.sh || exit 1
diff --git a/Dockerfile b/Dockerfile
index 07f1c75..51a9071 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,6 +25,12 @@ RUN apt-get update && apt-get install -y \
 RUN curl https://sh.rustup.rs -sSf | \
     sh -s -- --default-toolchain nightly -y
 ENV PATH=/root/.cargo/bin:$PATH
+RUN cd ~ && git clone --depth 1 'https://github.com/fmtlib/fmt' \
+    && cd fmt && mkdir -p build && cd build \
+    && cmake -DCMAKE_BUILD_TYPE=Release .. "-DCMAKE_INSTALL_PREFIX=/clib" \
+    -DFMT_DOC=OFF -DFMT_TEST=OFF \
+    && make -j$(grep -c ^processor /proc/cpuinfo) && make install \
+    && cd ~ && rm -rf fmt
 RUN cd ~ && git clone --depth 1 'https://github.com/Exiv2/exiv2' \
     && cd exiv2 && mkdir -p build && cd build \
     && cmake -DCMAKE_BUILD_TYPE=Release .. "-DCMAKE_INSTALL_PREFIX=/clib" \
diff --git a/scripts/build_fmt.sh b/scripts/build_fmt.sh
new file mode 100755
index 0000000..009032d
--- /dev/null
+++ b/scripts/build_fmt.sh
@@ -0,0 +1,6 @@
+export PREFIX=`pwd`/clib
+mkdir -p cbuild && cd cbuild || exit 1
+git clone --depth 1 'https://github.com/fmtlib/fmt' && cd fmt || exit 1
+mkdir -p build && cd build || exit 1
+cmake -DCMAKE_BUILD_TYPE=Release "-DCMAKE_INSTALL_PREFIX=$PREFIX" -DFMT_DOC=OFF -DFMT_TEST=OFF ../ || exit 1
+make -j8 && make install || exit 1
diff --git a/scripts/build_win_fmt.bat b/scripts/build_win_fmt.bat
new file mode 100644
index 0000000..2ef3ae7
--- /dev/null
+++ b/scripts/build_win_fmt.bat
@@ -0,0 +1,24 @@
+@ECHO OFF
+SETLOCAL
+SET TOP=%CD%
+SET PREFIX=%CD%\clib
+IF NOT EXIST cbuild (
+    MD cbuild || EXIT /B 1
+)
+CD cbuild || EXIT /B 1
+git clone --depth 1 "https://github.com/fmtlib/fmt" || EXIT /B %ERRORLEVEL%
+CD fmt || EXIT /B %ERRORLEVEL%
+IF NOT EXIST build (
+    MD build || EXIT /B 1
+)
+CD build || EXIT /B 1
+cmake ^
+    -G Ninja ^
+    -DCMAKE_PREFIX_PATH=%PREFIX% ^
+    -DCMAKE_BUILD_TYPE=Release ^
+    -DCMAKE_INSTALL_PREFIX=%PREFIX% ^
+    -DFMT_DOC=OFF ^
+    -DFMT_TEST=OFF ^
+    ../ || EXIT /B %ERRORLEVEL%
+ninja && ninja install || ninja && ninja install || EXIT /B %ERRORLEVEL%
+ENDLOCAL
\ No newline at end of file
diff --git a/scripts/get_cache_key.py b/scripts/get_cache_key.py
index dab099e..da14630 100644
--- a/scripts/get_cache_key.py
+++ b/scripts/get_cache_key.py
@@ -7,7 +7,7 @@ from time import gmtime, time, strftime
 from typing import List
 
 
-ALL_FEATURES = ['exiv2', 'expat', 'ffmpeg', 'libzip', 'openssl', 'pkgconf', 'rapidjson', 'x264', 'zlib']
+ALL_FEATURES = ['exiv2', 'expat', 'ffmpeg', 'fmt', 'libzip', 'openssl', 'pkgconf', 'rapidjson', 'x264', 'zlib']
 
 def sha256(data) -> str:
     if isinstance(data, str):