diff --git a/powerdns_api_proxy/config.py b/powerdns_api_proxy/config.py
index 7a43959..006fe92 100644
--- a/powerdns_api_proxy/config.py
+++ b/powerdns_api_proxy/config.py
@@ -35,6 +35,7 @@ def load_config(path: Optional[Path] = None) -> ProxyConfig:
     return config
 
 
+@lru_cache(maxsize=1000)
 def token_defined(config: ProxyConfig, token: str) -> bool:
     sha512 = hashlib.sha512()
     sha512.update(token.encode())
@@ -57,6 +58,7 @@ def dependency_check_token_defined(
     check_token_defined(load_config(), X_API_Key)
 
 
+@lru_cache(maxsize=1000)
 def get_environment_for_token(
     config: ProxyConfig, token: str
 ) -> ProxyConfigEnvironment:
diff --git a/powerdns_api_proxy/models.py b/powerdns_api_proxy/models.py
index 751efcc..46a059e 100644
--- a/powerdns_api_proxy/models.py
+++ b/powerdns_api_proxy/models.py
@@ -133,6 +133,14 @@ def api_token_defined(cls, v):
             raise ValueError('pdns_api_token must a non-empty string')
         return v
 
+    def __hash__(self):
+        return hash(
+            self.pdns_api_url
+            + self.pdns_api_token
+            + str(self.pdns_api_verify_ssl)
+            + str(self.environments)
+        )
+
 
 class ResponseAllowed(BaseModel):
     zones: list[ProxyConfigZone]