diff --git a/Cargo.lock b/Cargo.lock
index d8b2fdbf9a..e89a45e5d5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -316,7 +316,7 @@ dependencies = [
  "hashbrown",
  "lock_api",
  "once_cell",
- "parking_lot_core 0.9.8",
+ "parking_lot_core 0.9.6",
 ]
 
 [[package]]
@@ -375,14 +375,14 @@ dependencies = [
 
 [[package]]
 name = "filetime"
-version = "0.2.21"
+version = "0.2.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5cbc844cecaee9d4443931972e1289c8ff485cb4cc2767cb03ca139ed6885153"
+checksum = "4e884668cd0c7480504233e951174ddc3b382f7c2666e3b7310b5c4e7b0c37f9"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall 0.2.16",
- "windows-sys 0.48.0",
+ "redox_syscall",
+ "windows-sys 0.42.0",
 ]
 
 [[package]]
@@ -1069,14 +1069,14 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.8.8"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "927a765cd3fc26206e66b296465fa9d3e5ab003e651c1b3c060e7956d96b19d2"
+checksum = "e5d732bc30207a6423068df043e3d02e0735b155ad7ce1a6f76fe2baa5b158de"
 dependencies = [
  "libc",
  "log",
  "wasi",
- "windows-sys 0.48.0",
+ "windows-sys 0.42.0",
 ]
 
 [[package]]
@@ -1108,9 +1108,9 @@ checksum = "2bf50223579dc7cdcfb3bfcacf7069ff68243f8c363f62ffa99cf000a6b9c451"
 
 [[package]]
 name = "notify"
-version = "6.0.1"
+version = "5.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5738a2795d57ea20abec2d6d76c6081186709c0024187cd5977265eda6598b51"
+checksum = "58ea850aa68a06e48fdb069c0ec44d0d64c8dbffa49bf3b6f7f0a901fdea1ba9"
 dependencies = [
  "bitflags 1.3.2",
  "crossbeam-channel",
@@ -1121,7 +1121,7 @@ dependencies = [
  "libc",
  "mio",
  "walkdir",
- "windows-sys 0.45.0",
+ "windows-sys 0.42.0",
 ]
 
 [[package]]
@@ -1198,7 +1198,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
 dependencies = [
  "lock_api",
- "parking_lot_core 0.9.8",
+ "parking_lot_core 0.9.6",
 ]
 
 [[package]]
@@ -1210,22 +1210,22 @@ dependencies = [
  "cfg-if",
  "instant",
  "libc",
- "redox_syscall 0.2.16",
+ "redox_syscall",
  "smallvec",
  "winapi",
 ]
 
 [[package]]
 name = "parking_lot_core"
-version = "0.9.8"
+version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93f00c865fe7cabf650081affecd3871070f26767e7b2070a3ffae14c654b447"
+checksum = "ba1ef8814b5c993410bb3adfad7a5ed269563e4a2f90c41f5d85be7fb47133bf"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall 0.3.5",
+ "redox_syscall",
  "smallvec",
- "windows-targets 0.48.0",
+ "windows-sys 0.42.0",
 ]
 
 [[package]]
@@ -1258,9 +1258,9 @@ checksum = "9b2a4787296e9989611394c33f193f676704af1686e70b8f8033ab5ba9a35a94"
 
 [[package]]
 name = "perf-event"
-version = "0.4.8"
+version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4d6393d9238342159080d79b78cb59c67399a8e7ecfa5d410bd614169e4e823"
+checksum = "5396562cd2eaa828445d6d34258ae21ee1eb9d40fe626ca7f51c8dccb4af9d66"
 dependencies = [
  "libc",
  "perf-event-open-sys",
@@ -1268,9 +1268,9 @@ dependencies = [
 
 [[package]]
 name = "perf-event-open-sys"
-version = "4.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c44fb1c7651a45a3652c4afc6e754e40b3d6e6556f1487e2b230bfc4f33c2a8"
+checksum = "ce9bedf5da2c234fdf2391ede2b90fabf585355f33100689bc364a3ea558561a"
 dependencies = [
  "libc",
 ]
@@ -1481,15 +1481,6 @@ dependencies = [
  "bitflags 1.3.2",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
-dependencies = [
- "bitflags 1.3.2",
-]
-
 [[package]]
 name = "rowan"
 version = "0.15.11"
@@ -1513,6 +1504,7 @@ dependencies = [
  "crossbeam-channel",
  "dissimilar",
  "expect-test",
+ "filetime",
  "flycheck",
  "hir",
  "hir-def",
@@ -1525,10 +1517,12 @@ dependencies = [
  "lsp-types",
  "mbe",
  "mimalloc",
+ "mio",
  "nohash-hasher",
  "num_cpus",
  "oorandom",
  "parking_lot 0.12.1",
+ "parking_lot_core 0.9.6",
  "proc-macro-api",
  "profile",
  "project-model",
@@ -2215,37 +2209,13 @@ dependencies = [
  "windows_x86_64_msvc 0.42.2",
 ]
 
-[[package]]
-name = "windows-sys"
-version = "0.45.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
-dependencies = [
- "windows-targets 0.42.2",
-]
-
 [[package]]
 name = "windows-sys"
 version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
 dependencies = [
- "windows-targets 0.48.0",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.42.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
-dependencies = [
- "windows_aarch64_gnullvm 0.42.2",
- "windows_aarch64_msvc 0.42.2",
- "windows_i686_gnu 0.42.2",
- "windows_i686_msvc 0.42.2",
- "windows_x86_64_gnu 0.42.2",
- "windows_x86_64_gnullvm 0.42.2",
- "windows_x86_64_msvc 0.42.2",
+ "windows-targets",
 ]
 
 [[package]]
diff --git a/crates/profile/Cargo.toml b/crates/profile/Cargo.toml
index 8cb0901b6d..937834a82a 100644
--- a/crates/profile/Cargo.toml
+++ b/crates/profile/Cargo.toml
@@ -20,7 +20,7 @@ countme = { version = "3.0.1", features = ["enable"] }
 jemalloc-ctl = { version = "0.5.0", package = "tikv-jemalloc-ctl", optional = true }
 
 [target.'cfg(target_os = "linux")'.dependencies]
-perf-event = "=0.4.8"
+perf-event = "=0.4.7"
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3.9", features = ["processthreadsapi", "psapi"] }
diff --git a/crates/rust-analyzer/Cargo.toml b/crates/rust-analyzer/Cargo.toml
index 36423a4200..14104b0955 100644
--- a/crates/rust-analyzer/Cargo.toml
+++ b/crates/rust-analyzer/Cargo.toml
@@ -47,6 +47,12 @@ triomphe.workspace = true
 nohash-hasher.workspace = true
 always-assert = "0.1.2"
 
+# These 3 deps are not used by r-a directly, but we list them here to lock in their versions
+# in our transitive deps to prevent them from pulling in windows-sys 0.45.0
+mio = "=0.8.5"
+filetime = "=0.2.19"
+parking_lot_core = "=0.9.6"
+
 cfg.workspace = true
 flycheck.workspace = true
 hir-def.workspace = true
diff --git a/crates/vfs-notify/Cargo.toml b/crates/vfs-notify/Cargo.toml
index ddf4b303b2..95c5142517 100644
--- a/crates/vfs-notify/Cargo.toml
+++ b/crates/vfs-notify/Cargo.toml
@@ -15,7 +15,8 @@ doctest = false
 tracing = "0.1.35"
 walkdir = "2.3.2"
 crossbeam-channel = "0.5.5"
-notify = "6.0.1"
+# We demand 5.1.0 as any higher version pulls in a new windows-sys dupe
+notify = "=5.1.0"
 
 stdx.workspace = true
 vfs.workspace = true