diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 844355042..57bb1b92a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 # Contributing to Ebiten
 
-Ebiten is an open source project and we would appricate your conributions!
+Ebiten is an open source project and we would appreciate your contributions!
 
 There are some rules for Ebiten contribution.
 
diff --git a/doc.go b/doc.go
index a76e13744..8e67d84c1 100644
--- a/doc.go
+++ b/doc.go
@@ -40,7 +40,7 @@
 //
 //     func main() {
 //         game := &Game{}
-//         // Sepcify the window size as you like. Here, a doulbed size is specified.
+//         // Specify the window size as you like. Here, a doubled size is specified.
 //         ebiten.SetWindowSize(640, 480)
 //         ebiten.SetWindowTitle("Your game's title")
 //         // Call ebiten.RunGame to start your game loop.