diff --git a/README.md b/README.md
index c4b6e94..10fd93f 100644
--- a/README.md
+++ b/README.md
@@ -66,10 +66,10 @@ WORKSPACE=dev
 RECORD_SKIP_LIST=<oai-pmh-id1> <oai-pmh-id2>
 
 # Sets the interval for logging status updates as records are written to the output file. Defaults to 1000, which will log a status update for every thousandth record.
-STATUS_UPDATE_INTERVAL = 1000
+STATUS_UPDATE_INTERVAL=1000
 
-# If set to a valid Sentry DSN, enables Sentry exception monitoring This is not needed for local development.
-SENTRY_DSN = <sentry-dsn-for-oai-pmh-harvester>
+# If set to a valid Sentry DSN, enables Sentry exception monitoring. This can also be set to 'none'.
+SENTRY_DSN=<sentry-dsn-for-oai-pmh-harvester>
 ```
 
 ## CLI commands
diff --git a/harvester/config.py b/harvester/config.py
index 1af6a1f..6b21bb2 100644
--- a/harvester/config.py
+++ b/harvester/config.py
@@ -14,8 +14,8 @@
 
 
 class Config:
-    REQUIRED_ENV_VARS = ("WORKSPACE", "SENTRY_DSN")
-    OPTIONAL_ENV_VARS = ("RECORD_SKIP_LIST", "STATUS_UPDATE_INTERVAL")
+    REQUIRED_ENV_VARS = ("WORKSPACE",)
+    OPTIONAL_ENV_VARS = ("RECORD_SKIP_LIST", "SENTRY_DSN", "STATUS_UPDATE_INTERVAL")
 
     def __init__(self, logger: logging.Logger | None = None):
         """Set root logger as default when creating class instance."""
diff --git a/tests/test_config.py b/tests/test_config.py
index e6e7060..52e577f 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -51,14 +51,6 @@ def test_config_check_required_env_vars_success(config):
     config.check_required_env_vars()
 
 
-def test_config_check_required_env_vars_error(config, monkeypatch):
-    monkeypatch.delenv("SENTRY_DSN")
-    with pytest.raises(
-        OSError, match="Missing required environment variables: SENTRY_DSN"
-    ):
-        config.check_required_env_vars()
-
-
 def test_config_env_var_access_success(config):
     assert config.STATUS_UPDATE_INTERVAL == "1000"