diff --git a/httpcore/_async/http11.py b/httpcore/_async/http11.py
index e6d6d709..4c258bc8 100644
--- a/httpcore/_async/http11.py
+++ b/httpcore/_async/http11.py
@@ -33,7 +33,7 @@
 ]
 
 
-class HTTPConnectionState(enum.IntEnum):
+class HTTPConnectionState(enum.Enum):
     NEW = 0
     ACTIVE = 1
     IDLE = 2
diff --git a/httpcore/_async/http2.py b/httpcore/_async/http2.py
index dbd0beeb..287cbe1a 100644
--- a/httpcore/_async/http2.py
+++ b/httpcore/_async/http2.py
@@ -33,7 +33,7 @@ def has_body_headers(request: Request) -> bool:
     )
 
 
-class HTTPConnectionState(enum.IntEnum):
+class HTTPConnectionState(enum.Enum):
     ACTIVE = 1
     IDLE = 2
     CLOSED = 3
diff --git a/httpcore/_sync/http11.py b/httpcore/_sync/http11.py
index ebd3a974..45acb53c 100644
--- a/httpcore/_sync/http11.py
+++ b/httpcore/_sync/http11.py
@@ -33,7 +33,7 @@
 ]
 
 
-class HTTPConnectionState(enum.IntEnum):
+class HTTPConnectionState(enum.Enum):
     NEW = 0
     ACTIVE = 1
     IDLE = 2
diff --git a/httpcore/_sync/http2.py b/httpcore/_sync/http2.py
index ddcc1890..11e32aba 100644
--- a/httpcore/_sync/http2.py
+++ b/httpcore/_sync/http2.py
@@ -33,7 +33,7 @@ def has_body_headers(request: Request) -> bool:
     )
 
 
-class HTTPConnectionState(enum.IntEnum):
+class HTTPConnectionState(enum.Enum):
     ACTIVE = 1
     IDLE = 2
     CLOSED = 3