diff --git a/Cargo.lock b/Cargo.lock
index cff3462b0..cdac3c76d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -215,9 +215,9 @@ dependencies = [
 
 [[package]]
 name = "aho-corasick"
-version = "0.7.18"
+version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f"
+checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
 dependencies = [
  "memchr",
 ]
@@ -1094,9 +1094,9 @@ checksum = "a3e378b66a060d48947b590737b30a1be76706c8dd7b8ba0f2fe3989c68a853f"
 
 [[package]]
 name = "memchr"
-version = "2.5.0"
+version = "2.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
 
 [[package]]
 name = "mime"
@@ -1253,7 +1253,7 @@ dependencies = [
  "rand",
  "rand_chacha",
  "rand_xorshift",
- "regex-syntax 0.7.5",
+ "regex-syntax",
  "rusty-fork",
  "tempfile",
  "unarray",
@@ -1333,20 +1333,26 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.5.6"
+version = "1.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d83f127d94bdbcda4c8cc2e50f6f84f4b611f69c902699ca385a39c3a75f9ff1"
+checksum = "12de2eff854e5fa4b1295edd650e227e9d8fb0c9e90b12e7f36d6a6811791a29"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-syntax 0.6.26",
+ "regex-automata",
+ "regex-syntax",
 ]
 
 [[package]]
-name = "regex-syntax"
-version = "0.6.26"
+name = "regex-automata"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49b3de9ec5dc0a3417da371aab17d729997c15010e7fd24ff707773a33bddb64"
+checksum = "59b23e92ee4318893fa3fe3e6fb365258efbfe6ac6ab30f090cdcbb7aa37efa9"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
 
 [[package]]
 name = "regex-syntax"
diff --git a/taskchampion/xtask/Cargo.toml b/taskchampion/xtask/Cargo.toml
index 9a4c71e59..643d5aee6 100644
--- a/taskchampion/xtask/Cargo.toml
+++ b/taskchampion/xtask/Cargo.toml
@@ -9,4 +9,4 @@ anyhow.workspace = true
 
 taskchampion-lib = { path = "../lib" }
 
-regex = "^1.5.6"
+regex = "^1.9.4"