diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9a9108c..091f0d5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,7 @@ set(EXE_NAME "qr_${CMAKE_PROJECT_VERSION}-${ARCH}")
 
 project(
 	qr
-	VERSION 1.0.1
+	VERSION 1.1.0
 	LANGUAGES CXX
 )
 
diff --git a/main.cpp b/main.cpp
index 2114099..93a0848 100644
--- a/main.cpp
+++ b/main.cpp
@@ -20,7 +20,7 @@ Usage:
     -f --format    output file format. can be one of "cli, png, svg"
     -h --help      show this help
     -i --input     take data from this argument instead of stdin
-    -o --output    output file name
+    -o --output    output file name without extension
     -s --size      desired output file size in pixels
     -t --type      output QR code type. can be one of "small, medium, large"
 	
diff --git a/src/PNGRenderer.hpp b/src/PNGRenderer.hpp
index ddd8b54..a0de5d7 100644
--- a/src/PNGRenderer.hpp
+++ b/src/PNGRenderer.hpp
@@ -13,7 +13,7 @@ class PNGRenderer : public PixelRenderer {
 		virtual void render(const std::string& filename) override {
 			this->generateBuffer();
 
-			stbi_write_png(filename.c_str(), targetSize, targetSize, 4, this->bitmap.data(), sizeof(Color) * targetSize);
+			stbi_write_png((filename + ".png").c_str(), targetSize, targetSize, 4, this->bitmap.data(), sizeof(Color) * targetSize);
 		}
 
 };
diff --git a/src/SVGRenderer.hpp b/src/SVGRenderer.hpp
index a7a564f..ded525b 100644
--- a/src/SVGRenderer.hpp
+++ b/src/SVGRenderer.hpp
@@ -41,7 +41,7 @@ namespace massivedynamic {
 				file << "</svg>" << std::endl;
 
 				std::ofstream outFile;
-				outFile.open(filename);
+				outFile.open(filename + ".svg");
 				outFile << file.str();
 				outFile.close();
 			}