diff --git a/src/HttpClient/Plugin/Authentication/GceServiceAccount.php b/src/HttpClient/Plugin/Authentication/GceServiceAccount.php
index f23c9044..f932067d 100644
--- a/src/HttpClient/Plugin/Authentication/GceServiceAccount.php
+++ b/src/HttpClient/Plugin/Authentication/GceServiceAccount.php
@@ -21,8 +21,9 @@
 use Apigee\Edge\Client;
 use Apigee\Edge\ClientInterface;
 use Apigee\Edge\Exception\ApigeeOnGcpOauth2AuthenticationException;
-use Http\Client\Exception;
 use Http\Message\Authentication\Header;
+use Psr\Http\Client\ClientExceptionInterface;
+use Psr\Http\Client\NetworkExceptionInterface;
 
 /**
  * GCE Service Account authentication plugin for authenticating to Google
@@ -61,7 +62,7 @@ public function isAvailable(): bool
             $this->authClient()->get('');
 
             return true;
-        } catch (Exception $e) {
+        } catch (NetworkExceptionInterface $e) {
             return false;
         }
     }
@@ -85,7 +86,7 @@ protected function getAccessToken(): void
             $response = $this->authClient()->get('');
             $decoded_token = json_decode((string) $response->getBody(), true);
             $this->tokenStorage->saveToken($decoded_token);
-        } catch (Exception $e) {
+        } catch (ClientExceptionInterface $e) {
             throw new ApigeeOnGcpOauth2AuthenticationException($e->getMessage(), $e->getCode(), $e);
         }
     }