diff --git a/modem/arq_session_iss.py b/modem/arq_session_iss.py
index 7cb03b45..d487400d 100644
--- a/modem/arq_session_iss.py
+++ b/modem/arq_session_iss.py
@@ -18,7 +18,7 @@ class ARQSessionISS(arq_session.ARQSession):
 
     RETRIES_CONNECT = 3
     TIMEOUT_CONNECT_ACK = 7
-    TIMEOUT_TRANSFER = 15
+    TIMEOUT_TRANSFER = 10
 
     STATE_TRANSITION = {
         STATE_OPEN_SENT: {