diff --git a/.github/workflows/test_ci.yaml b/.github/workflows/test_ci.yaml
index af95acb..c231327 100644
--- a/.github/workflows/test_ci.yaml
+++ b/.github/workflows/test_ci.yaml
@@ -9,9 +9,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4
       - name: Run golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@3a919529898de77ec3da873e3063ca4b10e7f5cc # v3
         with:
           # Hard-coding version due to this bug: https://github.com/golangci/golangci-lint-action/issues/535
           version: v1.52.2
@@ -22,17 +22,17 @@ jobs:
       GITHUB_ACTION: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4
         with:
           go-version: 1.19
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4
         with:
           python-version: 'pypy3.9'
       - name: Set up gotestfmt
         uses: GoTestTools/gotestfmt-action@v2
-      - uses: actions/cache@v2
+      - uses: actions/cache@704facf57e6136b1bc63b828d79edcd491f0ee84 # v3
         with:
           path: |
             ~/go/pkg/mod
@@ -55,7 +55,7 @@ jobs:
           go tool cover -func /tmp/coverage.out
           echo "::endgroup::"
       - name: Upload test log
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3
         if: always()
         with:
           name: test-results
diff --git a/Dockerfile b/Dockerfile
index e653dc0..6c340fb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM quay.io/centos/centos:stream8
+FROM quay.io/centos/centos:stream8@sha256:86ba0bf60249e6daee350459e014213742c88341e6e7284695dcf1dfe2c58873
 
 COPY tests/test_script.sh /
 RUN dnf install net-tools -y
diff --git a/go.mod b/go.mod
index f7740fe..d52a3a2 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module go.flow.arcalot.io/pythondeployer
 go 1.18
 
 require (
-	go.arcalot.io/assert v1.4.0
+	go.arcalot.io/assert v1.6.0
 	go.arcalot.io/lang v1.0.0
 )
 
diff --git a/go.sum b/go.sum
index 0b58ffb..b4abaef 100644
--- a/go.sum
+++ b/go.sum
@@ -2,8 +2,8 @@ github.com/fxamacker/cbor/v2 v2.5.0 h1:oHsG0V/Q6E/wqTS2O1Cozzsy69nqCiguo5Q1a1ADi
 github.com/fxamacker/cbor/v2 v2.5.0/go.mod h1:TA1xS00nchWmaBnEIxPSE5oHLuJBAVvqrtAnWBwBCVo=
 github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
 github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg=
-go.arcalot.io/assert v1.4.0 h1:X7ptZSl4WrB+jUn53Kzvp3aPWCSsCgUp4iW2wdLEOv4=
-go.arcalot.io/assert v1.4.0/go.mod h1:Xy3ScX0p9IMY89gdsgexOKxnmDr0nGHG9dV7p8Uxg7w=
+go.arcalot.io/assert v1.6.0 h1:iKA8SZZ1MRblMX5QAwwY5RbpR+VNyp//4IU7vo08Xu0=
+go.arcalot.io/assert v1.6.0/go.mod h1:Xy3ScX0p9IMY89gdsgexOKxnmDr0nGHG9dV7p8Uxg7w=
 go.arcalot.io/lang v1.0.0 h1:mgDaieT4wWdZTnR4V7+/pgYRmzfU7VZZgIzHccuxAbY=
 go.arcalot.io/lang v1.0.0/go.mod h1:ALqfYEhAzC2WoGLaycmJoNJd5NmkR7V1PSKp/c5D278=
 go.arcalot.io/log/v2 v2.0.0 h1:mbmsWDVBXZNWrDzUh5JLzeGCQ59kTuMFs+pyfJGc1hk=