diff --git a/learn/learn.Android/learn.Android.csproj b/learn/learn.Android/learn.Android.csproj
index 44943a3..655b8b8 100644
--- a/learn/learn.Android/learn.Android.csproj
+++ b/learn/learn.Android/learn.Android.csproj
@@ -89,7 +89,7 @@
7.0.35
- 12.0.2
+ 13.0.1
2.1.0.4
diff --git a/learn/learn/learn.csproj b/learn/learn/learn.csproj
index d7df7c5..222a80e 100644
--- a/learn/learn/learn.csproj
+++ b/learn/learn/learn.csproj
@@ -6,7 +6,7 @@
-
+