diff --git a/brotab/env.py b/brotab/env.py
index a9ac7b6..634aeaf 100644
--- a/brotab/env.py
+++ b/brotab/env.py
@@ -17,11 +17,11 @@ def http_iface():
 
 
 def min_http_port():
-    return environ.get('MIN_HTTP_PORT', DEFAULT_MIN_HTTP_PORT)
+    return int(environ.get('MIN_HTTP_PORT', DEFAULT_MIN_HTTP_PORT))
 
 
 def max_http_port():
-    return environ.get('MAX_HTTP_PORT', DEFAULT_MAX_HTTP_PORT)
+    return int(environ.get('MAX_HTTP_PORT', DEFAULT_MAX_HTTP_PORT))
 
 
 def load_dotenv(filename=None):
diff --git a/brotab/inout.py b/brotab/inout.py
index 92d923d..49e1568 100644
--- a/brotab/inout.py
+++ b/brotab/inout.py
@@ -18,7 +18,7 @@
 
 
 def get_mediator_ports() -> Iterable:
-    return range(min_http_port(), max_http_port())
+    return range(min_http_port(), max_http_port() + 1)
 
 
 def get_available_tcp_port(start=1025, end=65536, host='127.0.0.1'):