diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 37826729b815d0390d0e64d8c0409a2f9fa90f13..5ec77ff86129e347d47ab6cc4aa5d5821f178bf0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -757,7 +757,7 @@ deploy-theodolite:
 test-slo-checker-lag-trend:
   stage: test
   needs: []
-  image: python:3.7-slim
+  image: python:3.8-slim
   before_script:
     - cd slo-checker/record-lag
   script:
@@ -773,7 +773,7 @@ test-slo-checker-lag-trend:
 test-slo-checker-dropped-records-kstreams:
   stage: test
   needs: []
-  image: python:3.7-slim
+  image: python:3.8-slim
   before_script:
     - cd slo-checker/dropped-records
   script:
@@ -789,7 +789,7 @@ test-slo-checker-dropped-records-kstreams:
 test-slo-checker-generic:
   stage: test
   needs: []
-  image: python:3.7-slim
+  image: python:3.8-slim
   before_script:
     - cd slo-checker/generic
   script:
diff --git a/slo-checker/dropped-records/requirements.txt b/slo-checker/dropped-records/requirements.txt
index 953c033de6079b216de576046c7f0fa08ade820b..da3e15dbc5afa1bf1342c51731fa8ba605f4fb4a 100644
--- a/slo-checker/dropped-records/requirements.txt
+++ b/slo-checker/dropped-records/requirements.txt
@@ -4,4 +4,4 @@ uvicorn>=0.15.0,<0.16.0
 #pydantic>=1.8.0,<2.0.0
 #scikit-learn==0.22.2
 pandas==1.0.3
-numpy==1.23.1
+numpy==1.23.4
diff --git a/slo-checker/generic/requirements.txt b/slo-checker/generic/requirements.txt
index 953c033de6079b216de576046c7f0fa08ade820b..da3e15dbc5afa1bf1342c51731fa8ba605f4fb4a 100644
--- a/slo-checker/generic/requirements.txt
+++ b/slo-checker/generic/requirements.txt
@@ -4,4 +4,4 @@ uvicorn>=0.15.0,<0.16.0
 #pydantic>=1.8.0,<2.0.0
 #scikit-learn==0.22.2
 pandas==1.0.3
-numpy==1.23.1
+numpy==1.23.4
diff --git a/slo-checker/record-lag/requirements.txt b/slo-checker/record-lag/requirements.txt
index 30cedad7e3926bbdf88ee55e1c4899314dce7c6f..fb29e338ee56872e9849ef31e129c88adfecbd28 100644
--- a/slo-checker/record-lag/requirements.txt
+++ b/slo-checker/record-lag/requirements.txt
@@ -4,4 +4,4 @@ uvicorn>=0.15.0,<0.16.0
 #pydantic>=1.8.0,<2.0.0
 scikit-learn==0.22.2
 pandas==1.0.3
-numpy==1.23.1
+numpy==1.23.4