diff --git a/components/nimbus/Cargo.toml b/components/nimbus/Cargo.toml
index 745690fe0a..666267b5d2 100644
--- a/components/nimbus/Cargo.toml
+++ b/components/nimbus/Cargo.toml
@@ -39,7 +39,7 @@ unicode-segmentation = "1.8.0"
 error-support = { path = "../support/error" }
 remote_settings = { path = "../remote_settings", optional = true }
 cfg-if = "1.0.0"
-regex = { version = "1.10.5", optional = true }
+regex = { version = "1.9", optional = true }
 firefox-versioning = { path = "../support/firefox-versioning", optional = true }
 
 [build-dependencies]
diff --git a/components/remote_settings/Cargo.toml b/components/remote_settings/Cargo.toml
index b1c4695d05..2d9c0e5e22 100644
--- a/components/remote_settings/Cargo.toml
+++ b/components/remote_settings/Cargo.toml
@@ -23,7 +23,7 @@ url = "2.1" # mozilla-central can't yet take 2.2 (see bug 1734538)
 camino = "1.0"
 rusqlite = { workspace = true, features = ["bundled"] }
 jexl-eval = "0.3.0"
-regex = "1.10.5"
+regex = "1.9"
 anyhow = "1.0"
 firefox-versioning = { path = "../support/firefox-versioning" }