diff --git a/.github/workflows/core_testmodels.yml b/.github/workflows/core_testmodels.yml
index 523511f56..57dcdeca5 100644
--- a/.github/workflows/core_testmodels.yml
+++ b/.github/workflows/core_testmodels.yml
@@ -36,7 +36,7 @@ jobs:
           cache-registries: "true"
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
-          pixi-version: "latest"
+          pixi-version: v0.30.0
       - name: Prepare pixi
         run: pixi run install-ci
       - name: Run testmodels with Ribasim Core
diff --git a/.github/workflows/core_tests.yml b/.github/workflows/core_tests.yml
index e2aa34a8b..153952ccc 100644
--- a/.github/workflows/core_tests.yml
+++ b/.github/workflows/core_tests.yml
@@ -36,7 +36,7 @@ jobs:
           cache-registries: "true"
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
-          pixi-version: "latest"
+          pixi-version: v0.30.0
       - name: Test Ribasim Core
         run: |
           pixi run test-ribasim-core-cov
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 7d538cbf0..b12e78290 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -27,7 +27,7 @@ jobs:
           cache-registries: "true"
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
-          pixi-version: "latest"
+          pixi-version: v0.30.0
       - name: Prepare pixi
         run: pixi run install-ci
 
diff --git a/.github/workflows/julia_auto_update.yml b/.github/workflows/julia_auto_update.yml
index 21b1d32f3..bc723d90d 100644
--- a/.github/workflows/julia_auto_update.yml
+++ b/.github/workflows/julia_auto_update.yml
@@ -16,7 +16,7 @@ jobs:
           ssh-key: ${{ secrets.SSH_PRIVATE_KEY }}
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
-          pixi-version: "latest"
+          pixi-version: v0.30.0
       - name: Update Julia manifest file
         run: |
           pixi run install-julia
diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 3ebea3fbc..5af19f4ac 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
-          pixi-version: "latest"
+          pixi-version: v0.30.0
       - name: Run mypy on python/ribasim
         run: |
           pixi run mypy-ribasim-python
diff --git a/.github/workflows/pixi_auto_update.yml b/.github/workflows/pixi_auto_update.yml
index f4b2ad775..d959b3172 100644
--- a/.github/workflows/pixi_auto_update.yml
+++ b/.github/workflows/pixi_auto_update.yml
@@ -19,6 +19,7 @@ jobs:
       - name: Set up pixi
         uses: prefix-dev/setup-pixi@v0.8.1
         with:
+          pixi-version: v0.30.0
           run-install: false
       - name: Update lockfiles
         run: |
diff --git a/.github/workflows/python_codegen.yml b/.github/workflows/python_codegen.yml
index f76927476..06170064f 100644
--- a/.github/workflows/python_codegen.yml
+++ b/.github/workflows/python_codegen.yml
@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
-          pixi-version: "latest"
+          pixi-version: v0.30.0
       - name: Test if codegen runs without errors
         run: pixi run codegen
       - name: Ensure that no code has been generated
diff --git a/.github/workflows/python_tests.yml b/.github/workflows/python_tests.yml
index 1a1ebbf95..293602dd3 100644
--- a/.github/workflows/python_tests.yml
+++ b/.github/workflows/python_tests.yml
@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: prefix-dev/setup-pixi@v0.8.1
         with:
-          pixi-version: "latest"
+          pixi-version: v0.30.0
       - name: Test Ribasim Python
         run: pixi run --environment ${{ matrix.pixi-environment }} test-ribasim-python-cov
       - name: Upload coverage to Codecov
diff --git a/.github/workflows/qgis.yml b/.github/workflows/qgis.yml
index 3275c8db4..eb97bfa0d 100644
--- a/.github/workflows/qgis.yml
+++ b/.github/workflows/qgis.yml
@@ -19,7 +19,7 @@ jobs:
           - uses: actions/checkout@v4
           - uses: prefix-dev/setup-pixi@v0.8.1
             with:
-              pixi-version: "latest"
+              pixi-version: v0.30.0
           - name: Run tests
             run: pixi run test-ribasim-qgis-docker
           - name: Upload coverage to Codecov