diff --git a/build/rust/bitflags/Cargo.toml b/build/rust/bitflags/Cargo.toml
index 7595f3b5bb99..a5e1d31a7d8b 100644
--- a/build/rust/bitflags/Cargo.toml
+++ b/build/rust/bitflags/Cargo.toml
@@ -2,7 +2,7 @@
 name = "bitflags"
 version = "1.999.999"
 edition = "2018"
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 
 [lib]
 path = "lib.rs"
diff --git a/build/rust/goblin/Cargo.toml b/build/rust/goblin/Cargo.toml
index 4b6ea811e97e..1b442d66e1fc 100644
--- a/build/rust/goblin/Cargo.toml
+++ b/build/rust/goblin/Cargo.toml
@@ -2,7 +2,7 @@
 name = "goblin"
 version = "0.7.999"
 edition = "2018"
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 
 [lib]
 path = "lib.rs"
diff --git a/build/rust/memoffset/Cargo.toml b/build/rust/memoffset/Cargo.toml
index 24eb01a58ba2..77859acdc2bd 100644
--- a/build/rust/memoffset/Cargo.toml
+++ b/build/rust/memoffset/Cargo.toml
@@ -2,7 +2,7 @@
 name = "memoffset"
 version = "0.8.999"
 edition = "2018"
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 
 [lib]
 path = "lib.rs"
diff --git a/gfx/wr/peek-poke/peek-poke-derive/Cargo.toml b/gfx/wr/peek-poke/peek-poke-derive/Cargo.toml
index ff9efe07fa8d..65b0affc29ba 100644
--- a/gfx/wr/peek-poke/peek-poke-derive/Cargo.toml
+++ b/gfx/wr/peek-poke/peek-poke-derive/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.3.0"
 authors = ["Dan Glastonbury <dan.glastonbury@gmail.com>"]
 repository = "https://github.com/servo/webrender"
 description = "Derive macro for peek-poke."
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 edition = "2018"
 
 [lib]
diff --git a/gfx/wr/wr_malloc_size_of/Cargo.toml b/gfx/wr/wr_malloc_size_of/Cargo.toml
index d5e5f0d10c21..6c1d6e7f2041 100644
--- a/gfx/wr/wr_malloc_size_of/Cargo.toml
+++ b/gfx/wr/wr_malloc_size_of/Cargo.toml
@@ -3,7 +3,7 @@ authors = ["The Servo Project Developers"]
 description = "Internal utility to measure memory usage in WebRender."
 name = "wr_malloc_size_of"
 version = "0.0.2"
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 edition = "2018"
 
 [lib]
diff --git a/intl/encoding_glue/Cargo.toml b/intl/encoding_glue/Cargo.toml
index 83c78315d977..2e7cc26b0a37 100644
--- a/intl/encoding_glue/Cargo.toml
+++ b/intl/encoding_glue/Cargo.toml
@@ -3,7 +3,7 @@ name = "encoding_glue"
 description = "FFI functions for mozilla::Encoding that aren't appropriate to share on crates.io due to m-c dependencies"
 version = "0.1.0"
 authors = ["Henri Sivonen <hsivonen@hsivonen.fi>"]
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 
 [features]
 simd-accel = ["encoding_rs/simd-accel"]
diff --git a/intl/l10n/rust/l10nregistry-rs/Cargo.toml b/intl/l10n/rust/l10nregistry-rs/Cargo.toml
index 5bc3656d6ee2..af480bdb65ed 100644
--- a/intl/l10n/rust/l10nregistry-rs/Cargo.toml
+++ b/intl/l10n/rust/l10nregistry-rs/Cargo.toml
@@ -2,7 +2,7 @@
 name = "l10nregistry"
 version = "0.3.0"
 authors = ["Zibi Braniecki <gandalf@mozilla.com>"]
-license = "Apache-2.0/MIT"
+license = "Apache-2.0 OR MIT"
 edition = "2018"
 
 [dependencies]
diff --git a/servo/components/malloc_size_of/Cargo.toml b/servo/components/malloc_size_of/Cargo.toml
index fe45affa8a09..1d2d7c1c32e7 100644
--- a/servo/components/malloc_size_of/Cargo.toml
+++ b/servo/components/malloc_size_of/Cargo.toml
@@ -2,7 +2,7 @@
 name = "malloc_size_of"
 version = "0.0.1"
 authors = ["The Servo Project Developers"]
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 publish = false
 
 [lib]
diff --git a/servo/components/servo_arc/Cargo.toml b/servo/components/servo_arc/Cargo.toml
index 51aeb0e1f3c5..4dda460bb743 100644
--- a/servo/components/servo_arc/Cargo.toml
+++ b/servo/components/servo_arc/Cargo.toml
@@ -2,7 +2,7 @@
 name = "servo_arc"
 version = "0.1.1"
 authors = ["The Servo Project Developers"]
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 repository = "https://github.com/servo/servo"
 description = "A fork of std::sync::Arc with some extra functionality and without weak references"
 
diff --git a/xpcom/rust/malloc_size_of_derive/Cargo.toml b/xpcom/rust/malloc_size_of_derive/Cargo.toml
index cd37a9da1f9c..e43706ed5371 100644
--- a/xpcom/rust/malloc_size_of_derive/Cargo.toml
+++ b/xpcom/rust/malloc_size_of_derive/Cargo.toml
@@ -2,7 +2,7 @@
 name = "malloc_size_of_derive"
 version = "0.1.3"
 authors = ["The Servo Project Developers"]
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 description = "Crate for Firefox memory reporting, not intended for external use"
 
 [lib]