diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8a8212..b6874de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+### Changed
+- Fix typos in error messages.
 
 ## [0.0.16] - 2020-01-22
 ### Added
@@ -88,4 +90,4 @@ ensure it's automatically sent in all API requests.
 [0.0.11]: https://github.com/zaproxy/zap-api-python/compare/0.0.10...0.0.11
 [0.0.10]: https://github.com/zaproxy/zap-api-python/compare/0.0.9...0.0.10
 [0.0.9]: https://github.com/zaproxy/zap-api-python/compare/0.0.8...0.0.9
-[0.0.8]: https://github.com/zaproxy/zap-api-python/compare/98ce6066deba2c65eb992489311e146fff9b3430...0.0.8
\ No newline at end of file
+[0.0.8]: https://github.com/zaproxy/zap-api-python/compare/98ce6066deba2c65eb992489311e146fff9b3430...0.0.8
diff --git a/src/examples/zap_example_api_script.py b/src/examples/zap_example_api_script.py
index f82fd4b..dd59b91 100755
--- a/src/examples/zap_example_api_script.py
+++ b/src/examples/zap_example_api_script.py
@@ -32,7 +32,7 @@
 # MANDATORY. Define the listening address of ZAP instance
 localProxy = {"http": "http://127.0.0.1:8080", "https": "http://127.0.0.1:8080"}
 
-# MANDATORY. True to create another ZAP session (overwritte the former if the
+# MANDATORY. True to create another ZAP session (overwrite the former if the
 # same name already exists), False to use an existing one
 isNewSession = True
 # MANDATORY. ZAP Session name
diff --git a/src/zapv2/__init__.py b/src/zapv2/__init__.py
index d5d4083..6048d13 100644
--- a/src/zapv2/__init__.py
+++ b/src/zapv2/__init__.py
@@ -170,11 +170,11 @@ def _request_api(self, url, query=None):
         response = self.session.get(url, params=query, proxies=self.__proxies, verify=False)
 
         if (self.__validate_status_code and response.status_code >= 300 and response.status_code < 500):
-            raise Exception("Non-successfull status code returned from ZAP, which indicates a bad request: " 
+            raise Exception("Non-successful status code returned from ZAP, which indicates a bad request: "
                                 + str(response.status_code)
                                 + "response: " + response.text )
         elif (self.__validate_status_code and response.status_code >= 500):
-            raise Exception("Non-successfull status code returned from ZAP, which indicates a ZAP internal error: " 
+            raise Exception("Non-successful status code returned from ZAP, which indicates a ZAP internal error: "
                                 + str(response.status_code)
                                 + "response: " + response.text )
         return response