diff --git a/.gitmodules b/.gitmodules
index 26f252ea..268c7e78 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
-[submodule "fmt"]
-	path = fmt
-	url = https://github.com/fmtlib/fmt
 [submodule "libuv"]
 	path = libuv
 	url = https://github.com/libuv/libuv
diff --git a/README.md b/README.md
index fdef0dac..ec24784e 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,6 @@ both can be installed with `sdkmanager` command line tool.
 ## Libraries
 
 * boost: [moritz-wundke/Boost-for-Android](https://github.com/moritz-wundke/Boost-for-Android)
-* fmt: [fmtlib/fmt](https://github.com/fmtlib/fmt)
 * libevent: [libevent/libevent](https://github.com/libevent/libevent/tree/release-2.1.12-stable)
 * libintl-lite: [j-jorge/libintl-lite](https://github.com/j-jorge/libintl-lite)
 * libime data: [fcitx/libime](https://github.com/fcitx/libime)
diff --git a/fmt b/fmt
deleted file mode 160000
index 12391371..00000000
--- a/fmt
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 123913715afeb8a437e6388b4473fcc4753e1c9a
diff --git a/prebuilder.cabal b/prebuilder.cabal
index e3619195..d59137a7 100644
--- a/prebuilder.cabal
+++ b/prebuilder.cabal
@@ -25,7 +25,6 @@ executable prebuilder
     Rules.AnthyData
     Rules.Boost
     Rules.Fcitx5
-    Rules.Fmt
     Rules.GLog
     Rules.LevelDB
     Rules.LibChewing
diff --git a/src/Main.hs b/src/Main.hs
index 6c8e9c4c..676c192c 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -16,7 +16,6 @@ import Development.Shake.Config
 import Rules.AnthyData
 import Rules.Boost
 import Rules.Fcitx5
-import Rules.Fmt
 import Rules.GLog
 import Rules.LevelDB
 import Rules.LibChewing
@@ -54,7 +53,6 @@ main = do
       libIMERule
       chineseAddonsRule
       libIMEJyutpingRule
-      fmtRule
       libuvRule
       libintlLiteRule
       luaRule
@@ -78,7 +76,6 @@ main = do
         let artifacts =
               [ "spell-dict",
                 "libime",
-                "fmt",
                 "chinese-addons-data",
                 "libime-jyutping",
                 "libuv",
@@ -104,8 +101,7 @@ main = do
         getToolchainVersions >>= writeFile' (outputDir </> "toolchain-versions.json") . TL.unpack . TLB.toLazyText . A.encodePrettyToTextBuilder
       "fcitx5" ~> do
         need
-          [ "fmt",
-            "libuv",
+          [ "libuv",
             "libintl-lite"
           ]
       "app" ~> do
diff --git a/src/Rules/Fmt.hs b/src/Rules/Fmt.hs
deleted file mode 100644
index 11f1c2cc..00000000
--- a/src/Rules/Fmt.hs
+++ /dev/null
@@ -1,24 +0,0 @@
-{-# LANGUAGE DeriveAnyClass #-}
-{-# LANGUAGE DeriveGeneric #-}
-{-# LANGUAGE DerivingStrategies #-}
-{-# LANGUAGE TypeFamilies #-}
-
-module Rules.Fmt (fmtRule) where
-
-import Base
-import CMakeBuilder
-
-data Fmt = Fmt
-  deriving stock (Eq, Show, Typeable, Generic)
-  deriving anyclass (Hashable, Binary, NFData)
-
-type instance RuleResult Fmt = ()
-
-fmtRule :: Rules ()
-fmtRule = do
-  buildFmt <-
-    useCMake
-      (cmakeBuilder "fmt")
-        { cmakeFlags = const ["-DFMT_TEST=OFF", "-DFMT_DOC=OFF"]
-        }
-  "fmt" ~> buildWithAndroidEnv buildFmt Fmt