diff --git a/.github/workflows/ci-additional.yaml b/.github/workflows/ci-additional.yaml
index bce74c4d244..d1117f40699 100644
--- a/.github/workflows/ci-additional.yaml
+++ b/.github/workflows/ci-additional.yaml
@@ -52,6 +52,8 @@ jobs:
           persist-credentials: false
       - uses: Parcels-code/pixi-lock/create-and-cache@38495788b79a5ff26009aecc15daa9a8310b8832 # v0.1.0
         id: pixi-lock
+        with:
+          pixi-version: v0.70.0
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pixi-lock
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4232128ead3..9b94f17540d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -53,6 +53,8 @@ jobs:
           persist-credentials: false
       - uses: Parcels-code/pixi-lock/create-and-cache@38495788b79a5ff26009aecc15daa9a8310b8832 # v0.1.0
         id: pixi-lock
+        with:
+          pixi-version: v0.70.0
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pixi-lock
diff --git a/.github/workflows/hypothesis.yaml b/.github/workflows/hypothesis.yaml
index 2ed8d0296df..d343c8278cd 100644
--- a/.github/workflows/hypothesis.yaml
+++ b/.github/workflows/hypothesis.yaml
@@ -59,6 +59,8 @@ jobs:
           persist-credentials: false
       - uses: Parcels-code/pixi-lock/create-and-cache@38495788b79a5ff26009aecc15daa9a8310b8832 # v0.1.0
         id: pixi-lock
+        with:
+          pixi-version: v0.70.0
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pixi-lock
diff --git a/.github/workflows/upstream-dev-ci.yaml b/.github/workflows/upstream-dev-ci.yaml
index 2e7f229c7b8..8084cad2b60 100644
--- a/.github/workflows/upstream-dev-ci.yaml
+++ b/.github/workflows/upstream-dev-ci.yaml
@@ -66,6 +66,8 @@ jobs:
           persist-credentials: false
       - uses: Parcels-code/pixi-lock/create-and-cache@38495788b79a5ff26009aecc15daa9a8310b8832 # v0.1.0
         id: pixi-lock
+        with:
+          pixi-version: v0.70.0
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         with:
           name: pixi-lock
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index f2ea760edc9..2fde432851a 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,8 +12,8 @@ build:
   jobs:
     create_environment:
       - asdf plugin add pixi
-      - asdf install pixi latest
-      - asdf global pixi latest
+      - asdf install pixi 0.70.0
+      - asdf global pixi 0.70.0
     post_checkout:
       - (git --no-pager log --pretty="tformat:%s" -1 | grep -vqF "[skip-rtd]") || exit 183
       - git fetch --unshallow || true