diff --git a/subjects/get_document_id/README.md b/subjects/get_document_id/README.md
index 5484dc55b6..021710c81e 100644
--- a/subjects/get_document_id/README.md
+++ b/subjects/get_document_id/README.md
@@ -13,7 +13,7 @@ Create the following structures which will help you get the `document_id` of the
 
 The `u32` is the `id` of the office generating the error.
 
-Beside the structures, you must create a **function** named `get_document_id`, and associate it to the `OfficeOne` structure.
+Besides the structures, you must create a **function** named `get_document_id`, and associate it to the `OfficeOne` structure.
 
 This **function** should return the `Result` value in the `OfficeFour` structure or the first `Err` it finds in the chain.
 
diff --git a/subjects/rot21/README.md b/subjects/rot21/README.md
index e5620ef6c1..2c32cc3393 100644
--- a/subjects/rot21/README.md
+++ b/subjects/rot21/README.md
@@ -6,7 +6,7 @@ The purpose of this exercise is to create a `rot21` function that works like the
 
 This function will receive a `string` and will rotate each letter of that `string` 21 times to the right.
 
-The function should only rotate letters. Punctuation, symbols and numbers should remain the unchanged.
+The function should only rotate letters. Punctuation, symbols and numbers should remain unchanged.
 
 ### Expected functions