diff --git a/codex-rs/.cargo/config.toml b/codex-rs/.cargo/config.toml
index 5d5eb8fd6f..09465f30c8 100644
--- a/codex-rs/.cargo/config.toml
+++ b/codex-rs/.cargo/config.toml
@@ -1,11 +1,18 @@
 [target.'cfg(all(windows, target_env = "msvc"))']
-rustflags = ["-C", "link-arg=/STACK:8388608"]
+rustflags = ["-C", "target-feature=+crt-static", "-C", "link-arg=/STACK:8388608"]
 
 # MSVC emits a warning about code that may trip "Cortex-A53 MPCore processor bug #843419" (see
 # https://developer.arm.com/documentation/epm048406/latest) which is sometimes emitted by LLVM.
 # Since Arm64 Windows 10+ isn't supported on that processor, it's safe to disable the warning.
 [target.aarch64-pc-windows-msvc]
-rustflags = ["-C", "link-arg=/STACK:8388608", "-C", "link-arg=/arm64hazardfree"]
+rustflags = [
+    "-C",
+    "target-feature=+crt-static",
+    "-C",
+    "link-arg=/STACK:8388608",
+    "-C",
+    "link-arg=/arm64hazardfree",
+]
 
 [target.'cfg(all(windows, target_env = "gnu"))']
 rustflags = ["-C", "link-arg=-Wl,--stack,8388608"]