diff --git a/.github/scripts/build-linux-aarch64.sh b/.github/scripts/build-linux-aarch64.sh
index ca6c532060..d98969b2b8 100755
--- a/.github/scripts/build-linux-aarch64.sh
+++ b/.github/scripts/build-linux-aarch64.sh
@@ -6,7 +6,7 @@ DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &> /dev/null && pwd)"
 
 mkdir -p artifacts
 mkdir -p utils
-cp "$(cs get https://github.com/coursier/coursier/releases/download/v2.1.25-M19/cs-aarch64-pc-linux.gz --archive)" utils/cs
+cp "$(cs get https://github.com/coursier/coursier/releases/download/v2.1.25-M21/cs-aarch64-pc-linux.gz --archive)" utils/cs
 chmod +x utils/cs
 
 cp "$DIR/build-linux-aarch64-from-docker.sh" utils/
diff --git a/.github/scripts/get-latest-cs.sh b/.github/scripts/get-latest-cs.sh
index dcabeab3b0..4e98b6b996 100644
--- a/.github/scripts/get-latest-cs.sh
+++ b/.github/scripts/get-latest-cs.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -e
 
-CS_VERSION="2.1.25-M19"
+CS_VERSION="2.1.25-M21"
 
 DIR="$(cs get --archive "https://github.com/coursier/coursier/releases/download/v$CS_VERSION/cs-x86_64-pc-win32.zip")"
 
diff --git a/build.mill.scala b/build.mill.scala
index dc5325e605..b19a0f8cdd 100644
--- a/build.mill.scala
+++ b/build.mill.scala
@@ -2,7 +2,7 @@ package build
 
 import $packages._
 import $ivy.`com.lihaoyi::mill-contrib-bloop:$MILL_VERSION`
-import $ivy.`io.get-coursier::coursier-launcher:2.1.25-M19`
+import $ivy.`io.get-coursier::coursier-launcher:2.1.25-M21`
 import $ivy.`io.github.alexarchambault.mill::mill-native-image-upload:0.1.31-1`
 import build.ci.publishVersion
 import build.project.deps
diff --git a/mill b/mill
index 273d80386b..edc610a8f8 100755
--- a/mill
+++ b/mill
@@ -2,7 +2,7 @@
 
 # Adapted from
 
-coursier_version="2.1.25-M19"
+coursier_version="2.1.25-M21"
 COMMAND=$@
 
 # necessary for Windows various shell environments
diff --git a/project/deps/package.mill.scala b/project/deps/package.mill.scala
index de82d75b52..7ef50ff6a1 100644
--- a/project/deps/package.mill.scala
+++ b/project/deps/package.mill.scala
@@ -126,7 +126,7 @@ object Deps {
     def ammoniteForScala3Lts = ammonite
     def argonautShapeless    = "1.3.1"
     // jni-utils version may need to be sync-ed when bumping the coursier version
-    def coursierDefault                   = "2.1.25-M19"
+    def coursierDefault                   = "2.1.25-M21"
     def coursier                          = coursierDefault
     def coursierCli                       = coursierDefault
     def coursierPublish                   = "0.4.3"