diff --git a/Cargo.lock b/Cargo.lock
index 925f178..7810774 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -146,13 +146,12 @@ dependencies = [
 
 [[package]]
 name = "dashmap"
-version = "5.1.0"
+version = "4.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0834a35a3fce649144119e18da2a4d8ed12ef3862f47183fd46f625d072d96c"
+checksum = "e77a43b28d0668df09411cb0bc9a8c2adc40f9a048afe863e05fd43251e8e39c"
 dependencies = [
  "cfg-if",
  "num_cpus",
- "parking_lot",
 ]
 
 [[package]]
@@ -404,7 +403,7 @@ dependencies = [
 
 [[package]]
 name = "i18n-embed-fl"
-version = "0.6.2"
+version = "0.6.3"
 dependencies = [
  "dashmap",
  "doc-comment",
diff --git a/i18n-embed-fl/CHANGELOG.md b/i18n-embed-fl/CHANGELOG.md
index 0af8b48..7b9a027 100644
--- a/i18n-embed-fl/CHANGELOG.md
+++ b/i18n-embed-fl/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog for `i18n-embed-fl`
 
+## v0.6.3
+
++ Revert `dashmap` back to `4.0` due to [security warning](https://rustsec.org/advisories/RUSTSEC-2022-0002.html)
+
+## v0.6.2
+
++ Update `dashmap` to version `5.1`.
+
 ## v0.6.1
 
 + Fix for #76, add missing `syn` dependency with `full` feature flag specified.
diff --git a/i18n-embed-fl/Cargo.toml b/i18n-embed-fl/Cargo.toml
index 72bfb6a..2fe9df6 100644
--- a/i18n-embed-fl/Cargo.toml
+++ b/i18n-embed-fl/Cargo.toml
@@ -2,7 +2,7 @@
 name = "i18n-embed-fl"
 description = "Macro to perform compile time checks when using the i18n-embed crate and the fluent localization system"
 categories = ["localization", "internationalization", "development-tools"]
-version = "0.6.2"
+version = "0.6.3"
 authors = ["Luke Frisken <l.frisken@gmail.com>"]
 edition = "2018"
 license = "MIT"
@@ -12,7 +12,7 @@ exclude = ["i18n.toml", "i18n/"]
 proc-macro = true
 
 [dependencies]
-dashmap = "5.1"
+dashmap = "4.0"
 find-crate = "0.6"
 fluent = "0.16"
 fluent-syntax = "0.11"