diff --git a/.efrocachemap b/.efrocachemap
index c94e9ecf..4b8f1691 100644
--- a/.efrocachemap
+++ b/.efrocachemap
@@ -4060,26 +4060,26 @@
   "build/assets/windows/Win32/ucrtbased.dll": "2def5335207d41b21b9823f6805997f1",
   "build/assets/windows/Win32/vc_redist.x86.exe": "b08a55e2e77623fe657bea24f223a3ae",
   "build/assets/windows/Win32/vcruntime140d.dll": "865b2af4d1e26a1a8073c89acb06e599",
-  "build/prefab/full/linux_arm64_gui/debug/ballisticakit": "be3e38d0503d272d22a9226323803564",
-  "build/prefab/full/linux_arm64_gui/release/ballisticakit": "feea24dbb10aec67e1aa4d6c1d0928b5",
-  "build/prefab/full/linux_arm64_server/debug/dist/ballisticakit_headless": "ac035cdcd1134ed3eefb50f2b6fee259",
-  "build/prefab/full/linux_arm64_server/release/dist/ballisticakit_headless": "aa71c8cf97c379aa2cc93b3edb050167",
-  "build/prefab/full/linux_x86_64_gui/debug/ballisticakit": "afaf8cc0bd7e93439366a43a80debdbc",
-  "build/prefab/full/linux_x86_64_gui/release/ballisticakit": "f787ba6f598297a6b43668949af0c8e2",
-  "build/prefab/full/linux_x86_64_server/debug/dist/ballisticakit_headless": "f8317a770d865a1380bfef13011ae1cc",
-  "build/prefab/full/linux_x86_64_server/release/dist/ballisticakit_headless": "39afba54e9822911d8bfdf53602fcc8d",
-  "build/prefab/full/mac_arm64_gui/debug/ballisticakit": "2fe24a441e96e882ce29cd55c886ee8e",
-  "build/prefab/full/mac_arm64_gui/release/ballisticakit": "4d068a5426f7e8814438a295f34d5356",
-  "build/prefab/full/mac_arm64_server/debug/dist/ballisticakit_headless": "e315d748000555f280fd6a0e9575f799",
-  "build/prefab/full/mac_arm64_server/release/dist/ballisticakit_headless": "753a957f642173a1568725ff0b36bfce",
-  "build/prefab/full/mac_x86_64_gui/debug/ballisticakit": "833be86309d39cfb7f273c4c72ffdafc",
-  "build/prefab/full/mac_x86_64_gui/release/ballisticakit": "49ad9d968f4d615323a840f036caa36f",
-  "build/prefab/full/mac_x86_64_server/debug/dist/ballisticakit_headless": "5795639a921b758c08a14ad09a8883d9",
-  "build/prefab/full/mac_x86_64_server/release/dist/ballisticakit_headless": "db31fcbdeeb8f5ab794a1f9f1dfe7ede",
-  "build/prefab/full/windows_x86_gui/debug/BallisticaKit.exe": "8aa9aa6b833d64d2e4a3689f6ce134fb",
-  "build/prefab/full/windows_x86_gui/release/BallisticaKit.exe": "7f6119e33678b934ac1c5f8002d8d6bc",
-  "build/prefab/full/windows_x86_server/debug/dist/BallisticaKitHeadless.exe": "639a01a7dcfd2f6db3023b610ad44d4a",
-  "build/prefab/full/windows_x86_server/release/dist/BallisticaKitHeadless.exe": "e925ad3d39bb366f78c6e0f9da22d0cb",
+  "build/prefab/full/linux_arm64_gui/debug/ballisticakit": "8561660678904509458b80bb4b62d8ea",
+  "build/prefab/full/linux_arm64_gui/release/ballisticakit": "f2e7de4723ce8fb6984a5bbd9ac93aa6",
+  "build/prefab/full/linux_arm64_server/debug/dist/ballisticakit_headless": "af1ade2cc275dacc7e1793383d766f3d",
+  "build/prefab/full/linux_arm64_server/release/dist/ballisticakit_headless": "bb806faa941b6c3c7834383264cf8571",
+  "build/prefab/full/linux_x86_64_gui/debug/ballisticakit": "648bfaca6487ff13cd27a31e317878f0",
+  "build/prefab/full/linux_x86_64_gui/release/ballisticakit": "38501876d5009ecaa936994ec6fbb3a2",
+  "build/prefab/full/linux_x86_64_server/debug/dist/ballisticakit_headless": "f7d354aded26684974b4d0fbb8725762",
+  "build/prefab/full/linux_x86_64_server/release/dist/ballisticakit_headless": "f6ceb8135fe4fb9aa7fc13fb1b835077",
+  "build/prefab/full/mac_arm64_gui/debug/ballisticakit": "402cb0d5a0abecfa9e578f3801b15e59",
+  "build/prefab/full/mac_arm64_gui/release/ballisticakit": "4eae3e6ade00be0224839bfc16351d2c",
+  "build/prefab/full/mac_arm64_server/debug/dist/ballisticakit_headless": "c6dd9b6cf876db50aa8d0cc0cc80efa4",
+  "build/prefab/full/mac_arm64_server/release/dist/ballisticakit_headless": "79d19536ed7de918c947c5095286b8ce",
+  "build/prefab/full/mac_x86_64_gui/debug/ballisticakit": "409140e2c39941dbc66088417399d5ea",
+  "build/prefab/full/mac_x86_64_gui/release/ballisticakit": "1a25fd7e3c5b94a294ce769083b71751",
+  "build/prefab/full/mac_x86_64_server/debug/dist/ballisticakit_headless": "7bfbb50681473702f286a50e56277b93",
+  "build/prefab/full/mac_x86_64_server/release/dist/ballisticakit_headless": "37ce7d3b865c0b58161c2d4ccdb54256",
+  "build/prefab/full/windows_x86_gui/debug/BallisticaKit.exe": "728dfc083916d7199dee1e75ad12e9fc",
+  "build/prefab/full/windows_x86_gui/release/BallisticaKit.exe": "fbf59de05d7e121d9c5dd164939228dc",
+  "build/prefab/full/windows_x86_server/debug/dist/BallisticaKitHeadless.exe": "1eb456e1b1c4d215912809950d938c1a",
+  "build/prefab/full/windows_x86_server/release/dist/BallisticaKitHeadless.exe": "65f507699fed78fcfa12e3e63af2bf8b",
   "build/prefab/lib/linux_arm64_gui/debug/libballisticaplus.a": "4f5d3cafbea651078c1721684b61033a",
   "build/prefab/lib/linux_arm64_gui/release/libballisticaplus.a": "7436c575aee1f9d112d41f18e2ae6b22",
   "build/prefab/lib/linux_arm64_server/debug/libballisticaplus.a": "4f5d3cafbea651078c1721684b61033a",
@@ -4096,14 +4096,14 @@
   "build/prefab/lib/mac_x86_64_gui/release/libballisticaplus.a": "2d9e14f7cfe50b1dc51e5e9eae05b5fd",
   "build/prefab/lib/mac_x86_64_server/debug/libballisticaplus.a": "b83a67eeaed0fc99bf995767a8150e5d",
   "build/prefab/lib/mac_x86_64_server/release/libballisticaplus.a": "2d9e14f7cfe50b1dc51e5e9eae05b5fd",
-  "build/prefab/lib/windows/Debug_Win32/BallisticaKitGenericPlus.lib": "8c6063999e8d77daf8bf8a33d045c737",
-  "build/prefab/lib/windows/Debug_Win32/BallisticaKitGenericPlus.pdb": "e60f8d06f584bac8e54d920776a4d57d",
-  "build/prefab/lib/windows/Debug_Win32/BallisticaKitHeadlessPlus.lib": "89b61adb57d6a53740f302d01e107587",
-  "build/prefab/lib/windows/Debug_Win32/BallisticaKitHeadlessPlus.pdb": "f347b87f6ee2167546edec41b750245c",
-  "build/prefab/lib/windows/Release_Win32/BallisticaKitGenericPlus.lib": "ed74c7fd0a854650675aa92366c2be3f",
-  "build/prefab/lib/windows/Release_Win32/BallisticaKitGenericPlus.pdb": "ac5046013922b1db4689c6ba653791c1",
-  "build/prefab/lib/windows/Release_Win32/BallisticaKitHeadlessPlus.lib": "52c36bf974594558a33f7c6caa07b81e",
-  "build/prefab/lib/windows/Release_Win32/BallisticaKitHeadlessPlus.pdb": "27e287e1826677d1b4a480820e5e2f3a",
+  "build/prefab/lib/windows/Debug_Win32/BallisticaKitGenericPlus.lib": "f6a855e83d7816e73d9859ff9e508190",
+  "build/prefab/lib/windows/Debug_Win32/BallisticaKitGenericPlus.pdb": "6cd203dce2718e0eded672c83c51506a",
+  "build/prefab/lib/windows/Debug_Win32/BallisticaKitHeadlessPlus.lib": "a1f81d6527bba562c3626e520ab8aa2d",
+  "build/prefab/lib/windows/Debug_Win32/BallisticaKitHeadlessPlus.pdb": "8b6a8b19f73b67413612185aa2d9ca5d",
+  "build/prefab/lib/windows/Release_Win32/BallisticaKitGenericPlus.lib": "2534af31cf9f8a86ddb7c92b0184f4b2",
+  "build/prefab/lib/windows/Release_Win32/BallisticaKitGenericPlus.pdb": "0cf7fb12f97a3f8176462ec5d1ddb992",
+  "build/prefab/lib/windows/Release_Win32/BallisticaKitHeadlessPlus.lib": "4afbbfa78e25e932d9392a1bd6bacc52",
+  "build/prefab/lib/windows/Release_Win32/BallisticaKitHeadlessPlus.pdb": "a0ba1ed33b7a83543b51f24a96941dfa",
   "src/assets/ba_data/python/babase/_mgen/__init__.py": "f885fed7f2ed98ff2ba271f9dbe3391c",
   "src/assets/ba_data/python/babase/_mgen/enums.py": "28323912b56ec07701eda3d41a6a4101",
   "src/ballistica/base/mgen/pyembed/binding_base.inc": "72bfed2cce8ff19741989dec28302f3f",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 12c13b0a..4423000a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,6 @@
-### 1.7.30 (build 21693, api 8, 2023-12-08)
+### 1.7.31 (build 21700, api 8, 2023-12-09)
+
+### 1.7.30 (build 21697, api 8, 2023-12-08)
 - Continued work on the big 1.7.28 update.
 - Got the Android version back up and running. There's been lots of cleanup and
   simplification on the Android layer, cleaning out years of cruft. This should
diff --git a/src/assets/ba_data/python/baenv.py b/src/assets/ba_data/python/baenv.py
index 3971d9c9..ba47b57e 100644
--- a/src/assets/ba_data/python/baenv.py
+++ b/src/assets/ba_data/python/baenv.py
@@ -52,8 +52,8 @@ if TYPE_CHECKING:
 
 # Build number and version of the ballistica binary we expect to be
 # using.
-TARGET_BALLISTICA_BUILD = 21693
-TARGET_BALLISTICA_VERSION = '1.7.30'
+TARGET_BALLISTICA_BUILD = 21700
+TARGET_BALLISTICA_VERSION = '1.7.31'
 
 
 @dataclass
diff --git a/src/ballistica/shared/ballistica.cc b/src/ballistica/shared/ballistica.cc
index c8c8d46d..2dec51aa 100644
--- a/src/ballistica/shared/ballistica.cc
+++ b/src/ballistica/shared/ballistica.cc
@@ -39,8 +39,8 @@ auto main(int argc, char** argv) -> int {
 namespace ballistica {
 
 // These are set automatically via script; don't modify them here.
-const int kEngineBuildNumber = 21693;
-const char* kEngineVersion = "1.7.30";
+const int kEngineBuildNumber = 21700;
+const char* kEngineVersion = "1.7.31";
 const int kEngineApiVersion = 8;
 
 #if BA_MONOLITHIC_BUILD