diff --git a/tools/connector-tester/README.md b/tools/connector-tester/README.md
index f1dc0fb..e24f9e1 100644
--- a/tools/connector-tester/README.md
+++ b/tools/connector-tester/README.md
@@ -27,7 +27,7 @@ docker start -i <container-id>
 The tester supports the following optional CLI arguments to alter its default behavior. You can append these options to the end of the docker run command provided in step 2 of [How To Run](https://github.com/fivetran/fivetran_sdk/blob/main/tools/connector-tester/README.md#how-to-run) section above.
 
 #### --port
-This option tells the tester onn which port it should run.
+This option tells the tester on which port it should run.
 
 #### --destination-schema
 With this option, you can alter the schema name used in the destination from the default `default_schema`.
diff --git a/tools/destination-tester/README.md b/tools/destination-tester/README.md
index 666bd4f..65c8a24 100644
--- a/tools/destination-tester/README.md
+++ b/tools/destination-tester/README.md
@@ -146,7 +146,7 @@ Here is an example input file named `input_1.json`:
 The tester supports the following optional CLI arguments to alter its default behavior. You can append these options to the end of the `docker run` command provided in step 2 of [How To Run](https://github.com/fivetran/fivetran_sdk/tree/main/tools/destination-tester#how-to-run) section above.
 
 #### --port
-This option tells the tester onn which port it should run.
+This option tells the tester on which port it should run.
 
 #### --plain-text
 This option disables encryption and compression of batch files for debugging purposes.