diff --git a/Cargo.lock b/Cargo.lock
index 1a442612385c..27ee38146097 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3225,21 +3225,21 @@ checksum = "dcf128d1287d2ea9d80910b5f1120d0b8eede3fbf1abe91c40d39ea7d51e6fda"
 
 [[package]]
 name = "rustc-std-workspace-alloc"
-version = "1.0.0"
+version = "1.99.0"
 dependencies = [
  "alloc",
 ]
 
 [[package]]
 name = "rustc-std-workspace-core"
-version = "1.0.0"
+version = "1.99.0"
 dependencies = [
  "core",
 ]
 
 [[package]]
 name = "rustc-std-workspace-std"
-version = "1.0.0"
+version = "1.99.0"
 dependencies = [
  "std",
 ]
diff --git a/src/tools/rustc-std-workspace-alloc/Cargo.toml b/src/tools/rustc-std-workspace-alloc/Cargo.toml
index ef7dc812af9d..9e04b14756e0 100644
--- a/src/tools/rustc-std-workspace-alloc/Cargo.toml
+++ b/src/tools/rustc-std-workspace-alloc/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rustc-std-workspace-alloc"
-version = "1.0.0"
+version = "1.99.0"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
 license = 'MIT OR Apache-2.0'
 description = """
diff --git a/src/tools/rustc-std-workspace-core/Cargo.toml b/src/tools/rustc-std-workspace-core/Cargo.toml
index 38ca56a557be..6b4e7540affc 100644
--- a/src/tools/rustc-std-workspace-core/Cargo.toml
+++ b/src/tools/rustc-std-workspace-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rustc-std-workspace-core"
-version = "1.0.0"
+version = "1.99.0"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
 license = 'MIT OR Apache-2.0'
 description = """
diff --git a/src/tools/rustc-std-workspace-std/Cargo.toml b/src/tools/rustc-std-workspace-std/Cargo.toml
index ce1644809dbe..e41554b74aff 100644
--- a/src/tools/rustc-std-workspace-std/Cargo.toml
+++ b/src/tools/rustc-std-workspace-std/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rustc-std-workspace-std"
-version = "1.0.0"
+version = "1.99.0"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
 license = 'MIT OR Apache-2.0'
 description = """