diff --git a/doc/tizen.net.sdk-reference.md b/doc/tizen.net.sdk-reference.md
index f4bbbe9..9e87c6e 100644
--- a/doc/tizen.net.sdk-reference.md
+++ b/doc/tizen.net.sdk-reference.md
@@ -30,7 +30,7 @@ Represents user files to tpk package
 
 #### TizenTpkUserExcludeFiles
 
-Represents files to exclude from tpk. ('*' can be used only when the files exists on project.)
+Represents files to exclude from tpk. ('*' can be used only when the files exist on project.)
 > Assemby files(.dll) can be excluded by specific filename. 
  
 
diff --git a/doc/tizen.net.sdk-signing-tpk.md b/doc/tizen.net.sdk-signing-tpk.md
index ec8093d..3f7719e 100644
--- a/doc/tizen.net.sdk-signing-tpk.md
+++ b/doc/tizen.net.sdk-signing-tpk.md
@@ -25,7 +25,7 @@ Build succeeded.
 
 ## Sign with User Certificate
 If you are developing a Tizen application on VS2017, you can manage your certificates through `Certificate Manager`. (see the [certificate manager](https://github.sec.samsung.net/dotnet/vs-tools-cps/blob/master/docs/tools/certificate-manager.md))
-Then you can build with your cetificate in Visual Studio.
+Then you can build with your certificate in Visual Studio.
 
 Otherwise, you can pass the certificate information to `Tizen.NET.Sdk` via the property.