diff --git a/.github/workflows/documentation.yaml b/.github/workflows/documentation.yaml
index 8b12266..9e90bf5 100644
--- a/.github/workflows/documentation.yaml
+++ b/.github/workflows/documentation.yaml
@@ -13,9 +13,9 @@ jobs:
     name: Build and publish documentation
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: "**/cpm_modules"
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
diff --git a/.github/workflows/install.yml b/.github/workflows/install.yml
index 8e616f9..f10b6dd 100644
--- a/.github/workflows/install.yml
+++ b/.github/workflows/install.yml
@@ -19,9 +19,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: "**/cpm_modules"
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 7f82fed..141a7ac 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -19,9 +19,9 @@ jobs:
     runs-on: macos-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: "**/cpm_modules"
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
diff --git a/.github/workflows/standalone.yml b/.github/workflows/standalone.yml
index 5d64e87..dff55dc 100644
--- a/.github/workflows/standalone.yml
+++ b/.github/workflows/standalone.yml
@@ -18,9 +18,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: "**/cpm_modules"
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 4600b0a..fa35e5b 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -18,9 +18,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: "**/cpm_modules"
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 16e82af..8839ff8 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -20,9 +20,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: "**/cpm_modules"
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 2d8ec46..82d5a35 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -19,9 +19,9 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: "**/cpm_modules"
           key: ${{ github.workflow }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c206ed6..8e686d9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,7 @@ CPMAddPackage("gh:TheLartians/PackageProject.cmake@1.8.0")
 
 CPMAddPackage(
   NAME fmt
-  GIT_TAG 8.1.1
+  GIT_TAG 9.1.0
   GITHUB_REPOSITORY fmtlib/fmt
   OPTIONS "FMT_INSTALL YES" # create an installable target
 )
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 3b94e9e..74cd08d 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -15,7 +15,7 @@ include(../cmake/tools.cmake)
 
 include(../cmake/CPM.cmake)
 
-CPMAddPackage("gh:onqtam/doctest@2.4.8")
+CPMAddPackage("gh:doctest/doctest@2.4.9")
 CPMAddPackage("gh:TheLartians/Format.cmake@1.7.3")
 
 if(TEST_INSTALLED_VERSION)