diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9d3dc8e..71b3ca2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        minor: [7, 8, 9]
+        minor: [8, 9, 10]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v1
diff --git a/Dockerfile b/Dockerfile
index c250ee3..8900c39 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.7
+FROM python:3.9
 
 WORKDIR /app/service
 COPY ./requirements.txt ./requirements.txt
diff --git a/karton/yaramatcher/yaramatcher.py b/karton/yaramatcher/yaramatcher.py
index 015ce85..8f32f92 100644
--- a/karton/yaramatcher/yaramatcher.py
+++ b/karton/yaramatcher/yaramatcher.py
@@ -177,7 +177,7 @@ def process_joesandbox(self, task: Task) -> List[str]:
 
         return yara_matches
 
-    def process(self, task: Task) -> None:  # type: ignore
+    def process(self, task: Task) -> None:
         headers = task.headers
         sample = task.get_resource("sample")
         yara_matches: List[str] = []
diff --git a/requirements.txt b/requirements.txt
index b844523..18bc4af 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-karton-core>=4.2.0,<5.0.0
+karton-core>=5.0.0,<6.0.0
 yara-python>=4.0.2