diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c80f5f7..cdabc6d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,5 @@
 name: unit tests
-on: [push]
+on: [push, pull_request]
 jobs:
   test:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/docker-in-ci.yml b/.github/workflows/docker-in-ci.yml
index 6154020..c6f66c6 100644
--- a/.github/workflows/docker-in-ci.yml
+++ b/.github/workflows/docker-in-ci.yml
@@ -2,6 +2,8 @@ name: docker
 
 on:
   pull_request:
+    branches:
+        - main
   push:
     branches:
       - main
@@ -11,18 +13,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Build docker basic image
         run: |
-          docker build -t abcd-graph .
+          docker build --pull -t abcd-graph .
 
       - name: Inspect basic docker image
         run: |
           docker image inspect abcd-graph
 
       - name: Run Trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@0.31.0
+        uses: aquasecurity/trivy-action@v0.36.0
         with:
           image-ref: 'abcd-graph'
           format: 'table'
@@ -41,18 +43,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Build docker full image
         run: |
-          docker build -t abcd-graph-full --build-arg INSTALL_TYPE=all .
+          docker build --pull -t abcd-graph-full --build-arg INSTALL_TYPE=all .
 
       - name: Inspect full docker image
         run: |
           docker image inspect abcd-graph-full
 
       - name: Run Trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@0.31.0
+        uses: aquasecurity/trivy-action@v0.36.0
         with:
           image-ref: 'abcd-graph-full'
           format: 'table'
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3b403c4..8cac50e 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -27,7 +27,7 @@ repos:
     -   id: flake8
         args: [ --max-line-length, "120" ]
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.4.1
+    rev: v2.3.1
     hooks:
       - id: mypy
         args: [ --config-file, pyproject.toml ]
diff --git a/Dockerfile b/Dockerfile
index 566f62c..257d723 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,10 @@
 FROM python:3.12-alpine AS build
 
+# Upgrade apk package repo
+RUN apk update && apk upgrade --no-cache
+
 # Install build tools + curl
-RUN apk add --no-cache \
+RUN apk add --no-cache --upgrade \
     bash \
     curl \
     libffi-dev \
diff --git a/src/abcd_graph/callbacks/visualizer.py b/src/abcd_graph/callbacks/visualizer.py
index b503617..03772b0 100644
--- a/src/abcd_graph/callbacks/visualizer.py
+++ b/src/abcd_graph/callbacks/visualizer.py
@@ -50,7 +50,7 @@ def after_build(self, graph: GraphImpl, context: BuildContext, exporter: GraphEx
 
     @require("matplotlib")
     def draw_community_cdf(self) -> None:
-        import matplotlib.pyplot as plt  # type: ignore[import]
+        import matplotlib.pyplot as plt  # type: ignore[import-not-found]
 
         assert self._graph is not None
 
@@ -104,7 +104,7 @@ def draw_communities(self) -> None:
         if self._model_used is not None and self._model_used.__name__ != "configuration_model":
             raise NotImplementedError("Drawing communities is only supported for the configuration model")
 
-        import networkx as nx  # type: ignore[import]
+        import networkx as nx
         from matplotlib import pyplot as plt
 
         assert self._exporter is not None
diff --git a/src/abcd_graph/exporter.py b/src/abcd_graph/exporter.py
index 52b4bbc..db26819 100644
--- a/src/abcd_graph/exporter.py
+++ b/src/abcd_graph/exporter.py
@@ -28,9 +28,9 @@
 from abcd_graph.utils import require
 
 if TYPE_CHECKING:  # pragma: no cover
-    from igraph import Graph as IGraph  # type: ignore[import]
-    from networkx import Graph as NetworkXGraph  # type: ignore[import]
-    from scipy.sparse import csr_matrix  # type: ignore[import]
+    from igraph import Graph as IGraph  # type: ignore[import-not-found]
+    from networkx import Graph as NetworkXGraph
+    from scipy.sparse import csr_matrix
 
 
 class GraphExporter:
@@ -49,7 +49,7 @@ def to_adjacency_matrix(self) -> NDArray[np.bool_]:
         return self._graph.to_adj_matrix()
 
     @require("scipy")
-    def to_sparse_adjacency_matrix(self) -> "csr_matrix":  # type: ignore[no-any-unimported]
+    def to_sparse_adjacency_matrix(self) -> "csr_matrix":
         from scipy.sparse import csr_matrix
 
         if not self.is_proper_abcd:
@@ -69,9 +69,10 @@ def to_igraph(self) -> "IGraph":  # type: ignore[no-any-unimported]
         return graph
 
     @require("networkx")
-    def to_networkx(self) -> "NetworkXGraph":  # type: ignore[no-any-unimported]
+    def to_networkx(self) -> "NetworkXGraph":
         import networkx as nx
 
+        graph: nx.Graph = nx.Graph()
         graph = nx.Graph()
 
         graph.add_nodes_from(range(self._graph._params.vcount))
diff --git a/src/abcd_graph/graph/core/utils.py b/src/abcd_graph/graph/core/utils.py
index 5e9c8e4..48a21f2 100644
--- a/src/abcd_graph/graph/core/utils.py
+++ b/src/abcd_graph/graph/core/utils.py
@@ -42,7 +42,7 @@ def powerlaw_distribution(choices: NDArray[np.float64], intensity: float) -> NDA
 
 
 def get_community_color_map(communities: list["Community"]) -> list[str]:
-    import matplotlib.colors as colors  # type: ignore[import]
+    import matplotlib.colors as colors  # type: ignore[import-not-found]
 
     colors_list = list(colors.BASE_COLORS.values())[: len(communities)]