diff --git a/software/glasgow/applet/interface/i2c_master/__init__.py b/software/glasgow/applet/interface/i2c_master/__init__.py
index 204a03a..942af99 100644
--- a/software/glasgow/applet/interface/i2c_master/__init__.py
+++ b/software/glasgow/applet/interface/i2c_master/__init__.py
@@ -285,7 +285,7 @@ class I2CMasterApplet(GlasgowApplet, name="i2c-master"):
 
     @classmethod
     def add_interact_arguments(cls, parser):
-        p_operation = parser.add_subparsers(dest="operation", metavar="OPERATION", required=True)
+        p_operation = parser.add_subparsers(dest="operation", metavar="OPERATION")
 
         def add_scan_id_argument(parser):
             parser.add_argument(
diff --git a/software/glasgow/applet/memory/_24x/__init__.py b/software/glasgow/applet/memory/_24x/__init__.py
index 684a38e..1db61d6 100644
--- a/software/glasgow/applet/memory/_24x/__init__.py
+++ b/software/glasgow/applet/memory/_24x/__init__.py
@@ -136,7 +136,7 @@ class Memory24xApplet(I2CMasterApplet, name="memory-24x"):
         def hex_bytes(arg):
             return bytes.fromhex(arg)
 
-        p_operation = parser.add_subparsers(dest="operation", metavar="OPERATION", required=True)
+        p_operation = parser.add_subparsers(dest="operation", metavar="OPERATION")
 
         p_read = p_operation.add_parser(
             "read", help="read memory")