diff --git a/src/CalcManager/ExpressionCommand.h b/src/CalcManager/ExpressionCommand.h
index 275c8da..dd94e6d 100644
--- a/src/CalcManager/ExpressionCommand.h
+++ b/src/CalcManager/ExpressionCommand.h
@@ -10,9 +10,9 @@ class CParentheses final : public IParenthesisCommand
 {
 public:
     CParentheses(_In_ int command);
-    int GetCommand() const;
-    CalculationManager::CommandType GetCommandType() const;
-    void Accept(_In_ ISerializeCommandVisitor &commandVisitor);
+    int GetCommand() const override;
+    CalculationManager::CommandType GetCommandType() const override;
+    void Accept(_In_ ISerializeCommandVisitor &commandVisitor) override;
 
 private:
     int m_command;
@@ -23,11 +23,11 @@ class CUnaryCommand final : public IUnaryCommand
 public:
     CUnaryCommand(int command);
     CUnaryCommand(int command1, int command2);
-    const std::shared_ptr<CalculatorVector<int>> & GetCommands() const;
-    CalculationManager::CommandType GetCommandType() const;
-    void SetCommand(int command);
-    void SetCommands(int command1, int command2);
-    void Accept(_In_ ISerializeCommandVisitor &commandVisitor);
+    const std::shared_ptr<CalculatorVector<int>> & GetCommands() const override;
+    CalculationManager::CommandType GetCommandType() const override;
+    void SetCommand(int command) override;
+    void SetCommands(int command1, int command2) override;
+    void Accept(_In_ ISerializeCommandVisitor &commandVisitor) override;
 
 private:
     std::shared_ptr<CalculatorVector<int>> m_command;
@@ -37,10 +37,10 @@ class CBinaryCommand final : public IBinaryCommand
 {
 public:
     CBinaryCommand(int command);
-    void SetCommand(int command);
-    int GetCommand() const;
-    CalculationManager::CommandType GetCommandType() const;
-    void Accept(_In_ ISerializeCommandVisitor &commandVisitor);
+    void SetCommand(int command) override;
+    int GetCommand() const override;
+    CalculationManager::CommandType GetCommandType() const override;
+    void Accept(_In_ ISerializeCommandVisitor &commandVisitor) override;
 
 private:
     int m_command;
@@ -56,17 +56,17 @@ public:
         bool fSciFmt);
     void Initialize(CalcEngine::Rational const& rat);
 
-    const std::shared_ptr<CalculatorVector<int>> & GetCommands() const;
-    void SetCommands(std::shared_ptr<CalculatorVector<int>> const& commands);
-    void AppendCommand(int command);
-    void ToggleSign();
-    void RemoveFromEnd();
-    bool IsNegative() const;
-    bool IsSciFmt() const;
-    bool IsDecimalPresent() const;
-    const std::wstring & GetToken(wchar_t decimalSymbol);
-    CalculationManager::CommandType GetCommandType() const;
-    void Accept(_In_ ISerializeCommandVisitor &commandVisitor);
+    const std::shared_ptr<CalculatorVector<int>> & GetCommands() const override;
+    void SetCommands(std::shared_ptr<CalculatorVector<int>> const& commands) override;
+    void AppendCommand(int command) override;
+    void ToggleSign() override;
+    void RemoveFromEnd() override;
+    bool IsNegative() const override;
+    bool IsSciFmt() const override;
+    bool IsDecimalPresent() const override;
+    const std::wstring & GetToken(wchar_t decimalSymbol) override;
+    CalculationManager::CommandType GetCommandType() const override;
+    void Accept(_In_ ISerializeCommandVisitor &commandVisitor) override;
     std::wstring GetString(uint32_t radix, int32_t precision, wchar_t decimalSymbol);
 
 private:
diff --git a/src/CalcManager/ExpressionCommandInterface.h b/src/CalcManager/ExpressionCommandInterface.h
index bf19bf2..ce89dd8 100644
--- a/src/CalcManager/ExpressionCommandInterface.h
+++ b/src/CalcManager/ExpressionCommandInterface.h
@@ -30,7 +30,7 @@ public:
 class IBinaryCommand : public IOperatorCommand
 {
 public:
-    virtual void SetCommand(int command) = 0;
+    virtual void SetCommand(int command) override = 0;
     virtual int GetCommand() const = 0;
 };