diff --git a/Cargo.lock b/Cargo.lock
index 7f24608d..0616c3f3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -271,7 +271,7 @@ version = "0.24.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6358dedf60f4d9b8db43ad187391afe959746101346fe51bb978126bec61dfb"
 dependencies = [
- "clap",
+ "clap 3.2.23",
  "heck 0.4.0",
  "indexmap",
  "log",
@@ -337,9 +337,9 @@ dependencies = [
 
 [[package]]
 name = "chrono-tz"
-version = "0.6.3"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29c39203181991a7dd4343b8005bd804e7a9a37afb8ac070e43771e8c820bbde"
+checksum = "a87b30366b6766751277791b473b674f3bf7fb75696841c784a3eb7e7fbf44ee"
 dependencies = [
  "chrono",
  "chrono-tz-build",
@@ -348,9 +348,9 @@ dependencies = [
 
 [[package]]
 name = "chrono-tz-build"
-version = "0.0.3"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f509c3a87b33437b05e2458750a0700e5bdd6956176773e6c7d6dd15a283a0c"
+checksum = "d9998fb9f7e9b2111641485bf8beb32f92945f97f92a3d061f744cfef335f751"
 dependencies = [
  "parse-zoneinfo",
  "phf",
@@ -382,20 +382,33 @@ checksum = "71655c45cb9845d3270c9d6df84ebe72b4dad3c2ba3f7023ad47c144e4e473a5"
 dependencies = [
  "atty",
  "bitflags",
- "clap_derive",
- "clap_lex",
+ "clap_lex 0.2.4",
  "indexmap",
- "once_cell",
  "strsim",
  "termcolor",
  "textwrap 0.16.0",
 ]
 
+[[package]]
+name = "clap"
+version = "4.0.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2148adefda54e14492fb9bddcc600b4344c5d1a3123bd666dcb939c6f0e0e57e"
+dependencies = [
+ "atty",
+ "bitflags",
+ "clap_derive",
+ "clap_lex 0.3.0",
+ "once_cell",
+ "strsim",
+ "termcolor",
+]
+
 [[package]]
 name = "clap_derive"
-version = "3.2.18"
+version = "4.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea0c8bce528c4be4da13ea6fead8965e95b6073585a2f05204bd8f4119f82a65"
+checksum = "0177313f9f02afc995627906bbd8967e2be069f5261954222dac78290c2b9014"
 dependencies = [
  "heck 0.4.0",
  "proc-macro-error",
@@ -413,6 +426,15 @@ dependencies = [
  "os_str_bytes",
 ]
 
+[[package]]
+name = "clap_lex"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d4198f73e42b4936b35b5bb248d81d2b595ecb170da0bac7655c54eedfa8da8"
+dependencies = [
+ "os_str_bytes",
+]
+
 [[package]]
 name = "cmake"
 version = "0.1.49"
@@ -592,7 +614,7 @@ name = "cozoserver"
 version = "0.2.0"
 dependencies = [
  "chrono",
- "clap",
+ "clap 4.0.26",
  "cozo",
  "env_logger",
  "log",
@@ -2052,7 +2074,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e1fb5f6f826b772a8d4c0394209441e7d37cbbb967ae9c7e0e8134365c9ee676"
 dependencies = [
  "siphasher",
- "uncased",
 ]
 
 [[package]]
@@ -3399,15 +3420,6 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e79c4d996edb816c91e4308506774452e55e95c3c9de07b6729e17e15a5ef81"
 
-[[package]]
-name = "uncased"
-version = "0.9.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09b01702b0fd0b3fadcf98e098780badda8742d4f4a7676615cad90e8ac73622"
-dependencies = [
- "version_check",
-]
-
 [[package]]
 name = "unicase"
 version = "2.6.0"
diff --git a/cozo-core/Cargo.toml b/cozo-core/Cargo.toml
index 4df5a5c1..0c61aefc 100644
--- a/cozo-core/Cargo.toml
+++ b/cozo-core/Cargo.toml
@@ -97,7 +97,7 @@ rmp-serde = "1.1.0"
 rmpv = "1.0.0"
 base64 = "0.13.0"
 chrono = "0.4.19"
-chrono-tz = "0.6.3"
+chrono-tz = "0.8.0"
 priority-queue = "1.2.3"
 ordered-float = "3.0.0"
 byteorder = "1.4.3"
diff --git a/cozoserver/Cargo.toml b/cozoserver/Cargo.toml
index 4e7e1e5f..7632c357 100644
--- a/cozoserver/Cargo.toml
+++ b/cozoserver/Cargo.toml
@@ -43,7 +43,7 @@ nothread = ["cozo/nothread"]
 
 [dependencies]
 cozo = { version = "0.2.0", path = "../cozo-core", default-features = false }
-clap = { version = "3.2.8", features = ["derive"] }
+clap = { version = "4.0.26", features = ["derive"] }
 rouille = "3.5.0"
 env_logger = "0.9.3"
 log = "0.4.17"