diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 867145d..7ccb705 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -19,7 +19,7 @@
 // own machine.
 {
   "name": "CPython 3.15.0rc1, debug build",
-  "image": "ghcr.io/tamnd/cpython-internals/cpython:debug@sha256:7baea8f3dd4de2e4c3b020543729b147e636494ae9758dabffb4675793e37170",
+  "image": "ghcr.io/tamnd/cpython-internals/cpython:debug@sha256:c61c84532ebe6f777111a8dc5655a19905ce40832b041632ad8e71668e5c2177",
 
   // gdb needs to attach to a process, and Docker's default seccomp profile blocks the call it
   // uses to do that. Without these two lines the debugger starts and then cannot run anything,
diff --git a/images/cpython.lock.json b/images/cpython.lock.json
index a98d137..90a3d2a 100644
--- a/images/cpython.lock.json
+++ b/images/cpython.lock.json
@@ -5,89 +5,89 @@
   "images": {
     "debug": {
       "amd64": {
-        "digest": "sha256:6ae95a549a95e610ad784052f35e44a50c164e7b9cdeb8279985a02698e513e5",
-        "built": "2026-08-31",
+        "digest": "sha256:1879acc37c263b9111d61b7e0d0acf857b56758102b425d162ea623bd3d91911",
+        "built": "2026-10-19",
         "size": 0
       },
       "arm64": {
-        "digest": "sha256:7d138f4a881a22412e4c40e15234f8a6df34302ba581c1687701100cce332591",
-        "built": "2026-08-31",
+        "digest": "sha256:9a6ee5e3af4d7271b46633fd554b3fe391330af2fd5f50239f1e8d4364cfbb92",
+        "built": "2026-10-19",
         "size": 0
       }
     },
     "freethreaded": {
       "amd64": {
-        "digest": "sha256:aa0d69b1f72f88d311ff0e3cac90ab1c461e1bc6d6682a3c663b46a0e306a6e5",
-        "built": "2026-08-31",
+        "digest": "sha256:b1b9000f52e7aa56add5f75826d046c1543fda12b8aea15093f8142ef363fb88",
+        "built": "2026-10-19",
         "size": 0
       },
       "arm64": {
-        "digest": "sha256:ad567a3c4b6e2bf6da384c70765befd30ea59cd06b65563b2750bc83ace3c554",
-        "built": "2026-08-31",
+        "digest": "sha256:b0f3be0958e2e4fd525ccb9a9cf34a6b398bed80b00c59731fef428f35919a3f",
+        "built": "2026-10-19",
         "size": 0
       }
     },
     "jit": {
       "amd64": {
-        "digest": "sha256:5ef434298ec1e128e21bf8260e84d32e48ce5d4c6b1df8a254b544d082c8027e",
-        "built": "2026-08-31",
+        "digest": "sha256:7510b1557ac189cc26d38bd25b845596578a84688d36604752afcc96b0f4d182",
+        "built": "2026-10-19",
         "size": 0
       },
       "arm64": {
-        "digest": "sha256:1400137f3e46a86b2ac83fc0c500675e358caff67cfb2afae337678074c489ce",
-        "built": "2026-08-31",
+        "digest": "sha256:cc6085c86d75d478a86040c9f23ec98aa1c447d8297f4670181633f9cc2257fe",
+        "built": "2026-10-19",
         "size": 0
       }
     },
     "release": {
       "amd64": {
-        "digest": "sha256:77f2fb432f8da2151ab8466580846cfc85fffd0331c27290b45fe52c1244df35",
-        "built": "2026-08-31",
+        "digest": "sha256:0fad4e7409b8aad38ad934d9fa05fc8b6bd4d9312b33ede1cb0a0b97b597cbac",
+        "built": "2026-10-19",
         "size": 0
       },
       "arm64": {
-        "digest": "sha256:177697c75a931fd68deed4c29f5112675f78b117e7db57f608952ee92fc45e2c",
-        "built": "2026-08-31",
+        "digest": "sha256:73016a06d8f3e110943ceb717066ab435af3d97d2eea7986c6d4b894278b3904",
+        "built": "2026-10-19",
         "size": 0
       }
     },
     "tailcall": {
       "amd64": {
-        "digest": "sha256:d7e4abd234eb4331352e6b2c5380456cfa864fd4e42173a6bab8965a20bce808",
-        "built": "2026-08-31",
+        "digest": "sha256:48d043b4b97a3e24533ae360f8e3a79b859b054dd47015b075b436fa7b897a7f",
+        "built": "2026-10-19",
         "size": 0
       },
       "arm64": {
-        "digest": "sha256:06d84df644d64b9e6d9c721245b8fccbbd466671651833ffbb34aa44f997418f",
-        "built": "2026-08-31",
+        "digest": "sha256:c637150bb215137c3dfe5b5672ec57a240e8378d41b795129ab22000a42c3b94",
+        "built": "2026-10-19",
         "size": 0
       }
     }
   },
   "indexes": {
     "debug": {
-      "digest": "sha256:7baea8f3dd4de2e4c3b020543729b147e636494ae9758dabffb4675793e37170",
-      "built": "2026-08-31",
+      "digest": "sha256:c61c84532ebe6f777111a8dc5655a19905ce40832b041632ad8e71668e5c2177",
+      "built": "2026-10-19",
       "size": 0
     },
     "freethreaded": {
-      "digest": "sha256:db72284e3a49f43c38b96bec2baed1380b8348e27ea6f54f6e8d0810b59c3144",
-      "built": "2026-08-31",
+      "digest": "sha256:45e218c9a99212938bd6754085cc5a89a0445930a7390fe03f3f6b5be8d7d7e0",
+      "built": "2026-10-19",
       "size": 0
     },
     "jit": {
-      "digest": "sha256:5f5383fc23837e7b3ea7792bd94cc8fa5c4cc436d8f7fc8ff5f854eab4eb7ccb",
-      "built": "2026-08-31",
+      "digest": "sha256:3d1be57c0048cdc4a41ecb304d595a005bf2a908e432f25c5a77bdd7e740dd99",
+      "built": "2026-10-19",
       "size": 0
     },
     "release": {
-      "digest": "sha256:fb55d6afcf053c974de6447fafbd2be6af20cdb9f596e25a0445607b8af981e3",
-      "built": "2026-08-31",
+      "digest": "sha256:3cbe2032993c1b895a86ea2c00737e8e18dbf98269e8abe15967d690041378f4",
+      "built": "2026-10-19",
       "size": 0
     },
     "tailcall": {
-      "digest": "sha256:e598c8e7336a48053f4b744fd28cd1e01b2d5bf4281629380afd9d06b7d7428a",
-      "built": "2026-08-31",
+      "digest": "sha256:e3c5e37710ac60fd0f4e8fc34f26517825d12898d1298708d976a9358ae02e7d",
+      "built": "2026-10-19",
       "size": 0
     }
   }