diff --git a/.npmrc b/.npmrc
deleted file mode 100644
index 289352cf..00000000
--- a/.npmrc
+++ /dev/null
@@ -1,3 +0,0 @@
-# `@std/*` packages live only on JSR, which mirrors them to npm under the `@jsr/*` scope.
-# Every other dependency resolves from the default npm registry.
-@jsr:registry=https://npm.jsr.io
diff --git a/bunfig.toml b/bunfig.toml
index 9723407e..b5ce7e69 100644
--- a/bunfig.toml
+++ b/bunfig.toml
@@ -4,6 +4,10 @@ linker = "isolated"
 # Match the SDK's supply-chain protection for every workspace installation.
 minimumReleaseAge = 259200
 
+[install.scopes]
+# JSR mirrors the SDK's `@std/*` test dependencies under the npm-compatible `@jsr/*` scope.
+jsr = "https://npm.jsr.io"
+
 [test]
 # Keep direct `bun test` at the workspace root consistent with the SDK's test setup.
 preload = ["./packages/hyperliquid/tests/_noCloseEvent.ts"]