diff --git a/include/exceptions.h b/include/exceptions.h
index 9e41e00..41603fe 100644
--- a/include/exceptions.h
+++ b/include/exceptions.h
@@ -48,7 +48,7 @@ namespace YAML
 	public:
 		Exception(int line_, int column_, const std::string& msg_)
 			: line(line_), column(column_), msg(msg_) {}
-		virtual ~Exception() throw () {}
+		virtual ~Exception() {}
 
 		int line, column;
 		std::string msg;
diff --git a/include/parser.h b/include/parser.h
index 83f611b..78ad52c 100644
--- a/include/parser.h
+++ b/include/parser.h
@@ -32,8 +32,8 @@ namespace YAML
 
 	private:
 		// can't copy this
-		Parser(const Parser& rhs) {}
-		Parser& operator = (const Parser& rhs) { return *this; }
+		Parser(const Parser&) {}
+		Parser& operator = (const Parser&) { return *this; }
 
 	private:
 		Scanner *m_pScanner;
diff --git a/yaml-reader.vcproj b/yaml-reader.vcproj
index f2522d1..57d70b9 100644
--- a/yaml-reader.vcproj
+++ b/yaml-reader.vcproj
@@ -115,7 +115,7 @@
 				AdditionalIncludeDirectories="include"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
-				WarningLevel="3"
+				WarningLevel="4"
 				DebugInformationFormat="3"
 			/>
 			<Tool