diff --git a/benches/Cargo.toml b/benches/Cargo.toml
index d00cecf62d..18c9ade4ed 100644
--- a/benches/Cargo.toml
+++ b/benches/Cargo.toml
@@ -8,6 +8,7 @@ homepage.workspace = true
 repository.workspace = true
 keywords.workspace = true
 license.workspace = true
+rust-version.workspace = true
 autobenches = false
 publish = false
 
diff --git a/examples/features/Cargo.toml b/examples/features/Cargo.toml
index 53029bd343..21416e7400 100644
--- a/examples/features/Cargo.toml
+++ b/examples/features/Cargo.toml
@@ -8,6 +8,7 @@ homepage.workspace = true
 repository.workspace = true
 keywords.workspace = true
 license.workspace = true
+rust-version.workspace = true
 publish = false
 
 [package.metadata.cargo-machete]
diff --git a/naga-cli/Cargo.toml b/naga-cli/Cargo.toml
index bf84f9a65f..2d00c4a06b 100644
--- a/naga-cli/Cargo.toml
+++ b/naga-cli/Cargo.toml
@@ -8,6 +8,12 @@ repository = "https://github.com/gfx-rs/wgpu/tree/trunk/naga-cli"
 keywords = ["shader", "SPIR-V", "GLSL", "MSL"]
 license = "MIT OR Apache-2.0"
 
+# Override the workspace's `rust-version` key. Firefox uses `cargo vendor` to
+# copy the crates it actually uses out of the workspace, so it's meaningful for
+# them to have less restrictive MSRVs individually than the workspace as a
+# whole, if their code permits. See `../README.md` for details.
+rust-version = "1.76"
+
 [[bin]]
 name = "naga"
 path = "src/bin/naga.rs"
diff --git a/naga/xtask/Cargo.toml b/naga/xtask/Cargo.toml
index 2b3f0247ac..5e779d2944 100644
--- a/naga/xtask/Cargo.toml
+++ b/naga/xtask/Cargo.toml
@@ -3,6 +3,7 @@ name = "xtask"
 version = "0.1.0"
 edition = "2021"
 publish = false
+rust-version = "1.83"
 
 [dependencies]
 anyhow = "1"
diff --git a/player/Cargo.toml b/player/Cargo.toml
index edeab7532b..086e2563a7 100644
--- a/player/Cargo.toml
+++ b/player/Cargo.toml
@@ -8,6 +8,7 @@ homepage.workspace = true
 repository.workspace = true
 keywords.workspace = true
 license.workspace = true
+rust-version.workspace = true
 publish = false
 
 [lib]
diff --git a/tests/Cargo.toml b/tests/Cargo.toml
index af37a472a1..10a0555aa5 100644
--- a/tests/Cargo.toml
+++ b/tests/Cargo.toml
@@ -8,6 +8,7 @@ homepage.workspace = true
 repository.workspace = true
 keywords.workspace = true
 license.workspace = true
+rust-version.workspace = true
 autotests = false
 publish = false
 
diff --git a/wgpu-info/Cargo.toml b/wgpu-info/Cargo.toml
index a287887a95..56ddf860bf 100644
--- a/wgpu-info/Cargo.toml
+++ b/wgpu-info/Cargo.toml
@@ -8,6 +8,7 @@ homepage.workspace = true
 repository.workspace = true
 keywords.workspace = true
 license.workspace = true
+rust-version.workspace = true
 
 [dependencies]
 anyhow.workspace = true
diff --git a/wgpu-macros/Cargo.toml b/wgpu-macros/Cargo.toml
index 3c605e6554..97c4f31396 100644
--- a/wgpu-macros/Cargo.toml
+++ b/wgpu-macros/Cargo.toml
@@ -8,6 +8,7 @@ homepage.workspace = true
 repository.workspace = true
 keywords.workspace = true
 license.workspace = true
+rust-version.workspace = true
 exclude = ["Cargo.lock"]
 publish = false
 
diff --git a/wgpu/Cargo.toml b/wgpu/Cargo.toml
index c6923f1be6..a69809c645 100644
--- a/wgpu/Cargo.toml
+++ b/wgpu/Cargo.toml
@@ -8,6 +8,7 @@ homepage.workspace = true
 repository.workspace = true
 keywords.workspace = true
 license.workspace = true
+rust-version.workspace = true
 readme = "../README.md"
 exclude = ["Cargo.lock"]
 
diff --git a/xtask/Cargo.toml b/xtask/Cargo.toml
index 502a596557..3f1022efbe 100644
--- a/xtask/Cargo.toml
+++ b/xtask/Cargo.toml
@@ -2,6 +2,7 @@
 name = "xtask"
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.83"
 publish = false
 
 [dependencies]