diff --git a/docs/packages/baseten-performance-client.yaml b/docs/packages/baseten-performance-client.yaml
index 933d914a222..2c158f67a2e 100644
--- a/docs/packages/baseten-performance-client.yaml
+++ b/docs/packages/baseten-performance-client.yaml
@@ -16,3 +16,5 @@ versions:
   - filename: baseten_performance_client-0.1.14-cp39-abi3-manylinux_2_38_riscv64.manylinux_2_39_riscv64.whl
     sha256: 7d295a213d698d709ad055dcdc8febe1855aabdcf17d51d42b7c178300b9b878
     requires-python: '>=3.8'
+- version: 0.1.15
+- version: 0.1.15.post1
diff --git a/patches/baseten-performance-client/0.1.15.post1/0001-python_bindings-bump-abi3-floor-to-py39.patch b/patches/baseten-performance-client/0.1.15.post1/0001-python_bindings-bump-abi3-floor-to-py39.patch
new file mode 100644
index 00000000000..9b9c5c97837
--- /dev/null
+++ b/patches/baseten-performance-client/0.1.15.post1/0001-python_bindings-bump-abi3-floor-to-py39.patch
@@ -0,0 +1,35 @@
+From a3716030fe826f7a9ad0f79a8a2b745c2a80febf Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Thu, 24 Sep 2026 01:08:06 +0000
+Subject: [PATCH] python_bindings: bump abi3 floor to py39
+
+Upstream-Status: Inappropriate [manylinux_2_39_riscv64 ships no cp38 interpreter]
+
+The riscv64 manylinux image's oldest available CPython is cp39 (no cp38),
+so a wheel built here and tagged cp38-abi3 (this crate's abi3-py38
+feature) would never actually be compiled or tested against its own
+declared floor -- gotcha 96. Bump the pyo3 abi3 feature to abi3-py39 to
+make the riscv64 wheel's tag match the oldest interpreter this repo can
+build and test it on; every other platform's wheel is unaffected.
+
+Signed-off-by: Ludovic Henry <git@ludovic.dev>
+---
+ baseten-performance-client/python_bindings/Cargo.toml | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/baseten-performance-client/python_bindings/Cargo.toml b/baseten-performance-client/python_bindings/Cargo.toml
+index 0aac17da..3cc4e98d 100644
+--- a/baseten-performance-client/python_bindings/Cargo.toml
++++ b/baseten-performance-client/python_bindings/Cargo.toml
+@@ -5,7 +5,7 @@ edition = "2021"
+ 
+ [dependencies]
+ baseten_performance_client_core = { path = "../core", features = ["native-tls"] }
+-pyo3 = { version = "0.24", features = ["extension-module", "abi3-py38"] }
++pyo3 = { version = "0.24", features = ["extension-module", "abi3-py39"] }
+ numpy = "0.24.0"
+ ndarray = "0.16"
+ pythonize = "*"
+-- 
+2.43.0
+
diff --git a/patches/baseten-performance-client/0.1.15/0001-python_bindings-bump-abi3-floor-to-py39.patch b/patches/baseten-performance-client/0.1.15/0001-python_bindings-bump-abi3-floor-to-py39.patch
new file mode 100644
index 00000000000..9b9c5c97837
--- /dev/null
+++ b/patches/baseten-performance-client/0.1.15/0001-python_bindings-bump-abi3-floor-to-py39.patch
@@ -0,0 +1,35 @@
+From a3716030fe826f7a9ad0f79a8a2b745c2a80febf Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Thu, 24 Sep 2026 01:08:06 +0000
+Subject: [PATCH] python_bindings: bump abi3 floor to py39
+
+Upstream-Status: Inappropriate [manylinux_2_39_riscv64 ships no cp38 interpreter]
+
+The riscv64 manylinux image's oldest available CPython is cp39 (no cp38),
+so a wheel built here and tagged cp38-abi3 (this crate's abi3-py38
+feature) would never actually be compiled or tested against its own
+declared floor -- gotcha 96. Bump the pyo3 abi3 feature to abi3-py39 to
+make the riscv64 wheel's tag match the oldest interpreter this repo can
+build and test it on; every other platform's wheel is unaffected.
+
+Signed-off-by: Ludovic Henry <git@ludovic.dev>
+---
+ baseten-performance-client/python_bindings/Cargo.toml | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/baseten-performance-client/python_bindings/Cargo.toml b/baseten-performance-client/python_bindings/Cargo.toml
+index 0aac17da..3cc4e98d 100644
+--- a/baseten-performance-client/python_bindings/Cargo.toml
++++ b/baseten-performance-client/python_bindings/Cargo.toml
+@@ -5,7 +5,7 @@ edition = "2021"
+ 
+ [dependencies]
+ baseten_performance_client_core = { path = "../core", features = ["native-tls"] }
+-pyo3 = { version = "0.24", features = ["extension-module", "abi3-py38"] }
++pyo3 = { version = "0.24", features = ["extension-module", "abi3-py39"] }
+ numpy = "0.24.0"
+ ndarray = "0.16"
+ pythonize = "*"
+-- 
+2.43.0
+