diff --git a/src/common/generators/plantuml/generator.h b/src/common/generators/plantuml/generator.h
index 0846517c..14c88a50 100644
--- a/src/common/generators/plantuml/generator.h
+++ b/src/common/generators/plantuml/generator.h
@@ -355,7 +355,7 @@ public:
     {
     }
 
-    virtual void HandleTranslationUnit(clang::ASTContext &ast_context)
+    void HandleTranslationUnit(clang::ASTContext &ast_context) override
     {
         visitor_.TraverseDecl(ast_context.getTranslationUnitDecl());
         visitor_.finalize();
diff --git a/src/common/model/diagram_filter.h b/src/common/model/diagram_filter.h
index 7df1e343..0d521048 100644
--- a/src/common/model/diagram_filter.h
+++ b/src/common/model/diagram_filter.h
@@ -88,7 +88,7 @@ struct anyof_filter : public filter_visitor {
     anyof_filter(
         filter_t type, std::vector<std::unique_ptr<filter_visitor>> filters);
 
-    virtual ~anyof_filter() = default;
+    ~anyof_filter() override = default;
 
     tvl::value_t match(
         const diagram &d, const common::model::element &e) const override;
@@ -103,7 +103,7 @@ private:
 struct namespace_filter : public filter_visitor {
     namespace_filter(filter_t type, std::vector<namespace_> namespaces);
 
-    virtual ~namespace_filter() = default;
+    ~namespace_filter() override = default;
 
     tvl::value_t match(const diagram &d, const namespace_ &ns) const override;
 
@@ -116,7 +116,7 @@ private:
 struct element_filter : public filter_visitor {
     element_filter(filter_t type, std::vector<std::string> elements);
 
-    virtual ~element_filter() = default;
+    ~element_filter() override = default;
 
     tvl::value_t match(const diagram &d, const element &e) const override;
 
@@ -127,7 +127,7 @@ private:
 struct subclass_filter : public filter_visitor {
     subclass_filter(filter_t type, std::vector<std::string> roots);
 
-    virtual ~subclass_filter() = default;
+    ~subclass_filter() override = default;
 
     tvl::value_t match(const diagram &d, const element &e) const override;
 
@@ -147,7 +147,7 @@ struct edge_traversal_filter : public filter_visitor {
     {
     }
 
-    virtual ~edge_traversal_filter() = default;
+    ~edge_traversal_filter() override = default;
 
     tvl::value_t match(const diagram &d, const MatchOverrideT &e) const override
     {
@@ -281,7 +281,7 @@ struct relationship_filter : public filter_visitor {
     relationship_filter(
         filter_t type, std::vector<relationship_t> relationships);
 
-    virtual ~relationship_filter() = default;
+    ~relationship_filter() override = default;
 
     tvl::value_t match(
         const diagram &d, const relationship_t &r) const override;
@@ -293,7 +293,7 @@ private:
 struct access_filter : public filter_visitor {
     access_filter(filter_t type, std::vector<access_t> access);
 
-    virtual ~access_filter() = default;
+    ~access_filter() override = default;
 
     tvl::value_t match(const diagram &d, const access_t &a) const override;
 
@@ -304,7 +304,7 @@ private:
 struct context_filter : public filter_visitor {
     context_filter(filter_t type, std::vector<std::string> context);
 
-    virtual ~context_filter() = default;
+    ~context_filter() override = default;
 
     tvl::value_t match(const diagram &d, const element &r) const override;
 
@@ -316,7 +316,7 @@ struct paths_filter : public filter_visitor {
     paths_filter(filter_t type, const std::filesystem::path &root,
         const std::vector<std::filesystem::path> &p);
 
-    virtual ~paths_filter() = default;
+    ~paths_filter() override = default;
 
     tvl::value_t match(
         const diagram &d, const common::model::source_file &r) const override;
diff --git a/src/common/model/element.h b/src/common/model/element.h
index cf79507e..5c9ee83b 100644
--- a/src/common/model/element.h
+++ b/src/common/model/element.h
@@ -36,7 +36,7 @@ class element : public diagram_element {
 public:
     element(namespace_ using_namespace);
 
-    virtual ~element() = default;
+    ~element() override = default;
 
     std::string name_and_ns() const
     {
diff --git a/src/config/config.h b/src/config/config.h
index 72271190..9d02d4e7 100644
--- a/src/config/config.h
+++ b/src/config/config.h
@@ -171,7 +171,7 @@ struct source_location {
 };
 
 struct class_diagram : public diagram {
-    virtual ~class_diagram() = default;
+    ~class_diagram() override = default;
 
     common::model::diagram_t type() const override;
 
@@ -182,7 +182,7 @@ struct class_diagram : public diagram {
 };
 
 struct sequence_diagram : public diagram {
-    virtual ~sequence_diagram() = default;
+    ~sequence_diagram() override = default;
 
     common::model::diagram_t type() const override;
 
@@ -190,7 +190,7 @@ struct sequence_diagram : public diagram {
 };
 
 struct package_diagram : public diagram {
-    virtual ~package_diagram() = default;
+    ~package_diagram() override = default;
 
     common::model::diagram_t type() const override;
 
@@ -198,7 +198,7 @@ struct package_diagram : public diagram {
 };
 
 struct include_diagram : public diagram {
-    virtual ~include_diagram() = default;
+    ~include_diagram() override = default;
 
     common::model::diagram_t type() const override;
 
diff --git a/src/include_diagram/generators/plantuml/include_diagram_generator.h b/src/include_diagram/generators/plantuml/include_diagram_generator.h
index d29c6563..7768b25d 100644
--- a/src/include_diagram/generators/plantuml/include_diagram_generator.h
+++ b/src/include_diagram/generators/plantuml/include_diagram_generator.h
@@ -57,7 +57,7 @@ public:
 
     void generate(const source_file &e, std::ostream &ostr) const;
 
-    void generate(std::ostream &ostr) const;
+    void generate(std::ostream &ostr) const override;
 };
 
 } // namespace plantuml
diff --git a/src/package_diagram/generators/plantuml/package_diagram_generator.h b/src/package_diagram/generators/plantuml/package_diagram_generator.h
index 294e33e6..53e86040 100644
--- a/src/package_diagram/generators/plantuml/package_diagram_generator.h
+++ b/src/package_diagram/generators/plantuml/package_diagram_generator.h
@@ -57,7 +57,7 @@ public:
 
     void generate(const package &e, std::ostream &ostr) const;
 
-    void generate(std::ostream &ostr) const;
+    void generate(std::ostream &ostr) const override;
 };
 
 } // namespace plantuml
diff --git a/src/sequence_diagram/generators/plantuml/sequence_diagram_generator.h b/src/sequence_diagram/generators/plantuml/sequence_diagram_generator.h
index a8303afe..0786b364 100644
--- a/src/sequence_diagram/generators/plantuml/sequence_diagram_generator.h
+++ b/src/sequence_diagram/generators/plantuml/sequence_diagram_generator.h
@@ -62,7 +62,7 @@ public:
         std::ostream &ostr,
         std::vector<common::model::diagram_element::id_t> &visited) const;
 
-    void generate(std::ostream &ostr) const;
+    void generate(std::ostream &ostr) const override;
 
 private:
     bool is_participant_generated(common::id_t id) const;