diff --git a/Lib/importlib/_bootstrap_external.py b/Lib/importlib/_bootstrap_external.py
index 5d63a1f23a8..076ed162bb0 100644
--- a/Lib/importlib/_bootstrap_external.py
+++ b/Lib/importlib/_bootstrap_external.py
@@ -229,6 +229,9 @@ _code_type = type(_write_atomic.__code__)
 # MAGIC must change whenever the bytecode emitted by the compiler may no
 # longer be understood by older implementations of the eval loop (usually
 # due to the addition of new opcodes).
+#
+# Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
+# in PC/launcher.c must also be updated.
 
 MAGIC_NUMBER = (3361).to_bytes(2, 'little') + b'\r\n'
 _RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little')  # For import.c
diff --git a/PC/launcher.c b/PC/launcher.c
index eac01f8ad8a..89a3ea24d3b 100644
--- a/PC/launcher.c
+++ b/PC/launcher.c
@@ -1068,21 +1068,21 @@ typedef struct {
 } PYC_MAGIC;
 
 static PYC_MAGIC magic_values[] = {
-    { 0xc687, 0xc687, L"2.0" },
-    { 0xeb2a, 0xeb2a, L"2.1" },
-    { 0xed2d, 0xed2d, L"2.2" },
-    { 0xf23b, 0xf245, L"2.3" },
-    { 0xf259, 0xf26d, L"2.4" },
-    { 0xf277, 0xf2b3, L"2.5" },
-    { 0xf2c7, 0xf2d1, L"2.6" },
-    { 0xf2db, 0xf303, L"2.7" },
-    { 0x0bb8, 0x0c3b, L"3.0" },
-    { 0x0c45, 0x0c4f, L"3.1" },
-    { 0x0c58, 0x0c6c, L"3.2" },
-    { 0x0c76, 0x0c9e, L"3.3" },
-    { 0x0cb2, 0x0cee, L"3.4" },
-    { 0x0cf8, 0x0d16, L"3.5" },
-    { 0x0d20, 0x0d20, L"3.6" },
+    { 50823, 50823, L"2.0" },
+    { 60202, 60202, L"2.1" },
+    { 60717, 60717, L"2.2" },
+    { 62011, 62021, L"2.3" },
+    { 62041, 62061, L"2.4" },
+    { 62071, 62131, L"2.5" },
+    { 62151, 62161, L"2.6" },
+    { 62171, 62211, L"2.7" },
+    { 3000, 3131, L"3.0" },
+    { 3141, 3151, L"3.1" },
+    { 3160, 3180, L"3.2" },
+    { 3190, 3230, L"3.3" },
+    { 3250, 3310, L"3.4" },
+    { 3320, 3350, L"3.5" },
+    { 3350, 3350, L"3.6" },
     { 0 }
 };