diff --git a/Cargo.lock b/Cargo.lock
index 0a5af226b..6353ef6e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4278,9 +4278,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.21.10"
+version = "0.21.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9d5a6813c0759e4609cd494e8e725babae6a2ca7b62a5536a13daaec6fcb7ba"
+checksum = "7fecbfb7b1444f477b345853b1fce097a2c6fb637b2bfb87e6bc5db0f043fae4"
 dependencies = [
  "ring 0.17.8",
  "rustls-webpki",
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
index f1ffb3bf6..b6c662dfa 100644
--- a/fuzz/Cargo.lock
+++ b/fuzz/Cargo.lock
@@ -94,6 +94,12 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0942ffc6dcaadf03badf6e6a2d0228460359d5e34b57ccdc720b7382dfbd5ec5"
 
+[[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
 [[package]]
 name = "android_system_properties"
 version = "0.1.5"
@@ -521,9 +527,9 @@ dependencies = [
 
 [[package]]
 name = "brotli"
-version = "4.0.0"
+version = "5.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "125740193d7fee5cc63ab9e16c2fdc4e07c74ba755cc53b327d6ea029e9fc569"
+checksum = "19483b140a7ac7174d34b5a581b406c64f84da5409d3e09cf4fff604f9270e67"
 dependencies = [
  "alloc-no-stdlib",
  "alloc-stdlib",
@@ -532,9 +538,9 @@ dependencies = [
 
 [[package]]
 name = "brotli-decompressor"
-version = "3.0.0"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65622a320492e09b5e0ac436b14c54ff68199bac392d0e89a6832c4518eea525"
+checksum = "e6221fe77a248b9117d431ad93761222e1cf8ff282d9d1d5d9f53d6299a1cf76"
 dependencies = [
  "alloc-no-stdlib",
  "alloc-stdlib",
@@ -639,17 +645,16 @@ dependencies = [
 
 [[package]]
 name = "chrono"
-version = "0.4.23"
+version = "0.4.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16b0a3d9ed01224b22057780a37bb8c5dbfe1be8ba48678e7bf57ec4b385411f"
+checksum = "a21f936df1771bf62b77f047b726c4625ff2e8aa607c01ec06e5a05bd8463401"
 dependencies = [
+ "android-tzdata",
  "iana-time-zone",
  "js-sys",
- "num-integer",
  "num-traits",
- "time 0.1.45",
  "wasm-bindgen",
- "winapi",
+ "windows-targets 0.52.0",
 ]
 
 [[package]]
@@ -959,7 +964,7 @@ dependencies = [
 
 [[package]]
 name = "deltachat"
-version = "1.137.2"
+version = "1.137.3"
 dependencies = [
  "anyhow",
  "async-channel 2.1.1",
@@ -968,9 +973,10 @@ dependencies = [
  "async-smtp",
  "async_zip",
  "backtrace",
- "base64 0.21.0",
+ "base64 0.22.0",
  "brotli",
  "chrono",
+ "deltachat-contact-tools",
  "deltachat-time",
  "deltachat_derive",
  "email",
@@ -1030,6 +1036,16 @@ dependencies = [
  "uuid 1.2.2",
 ]
 
+[[package]]
+name = "deltachat-contact-tools"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "once_cell",
+ "regex",
+ "rusqlite",
+]
+
 [[package]]
 name = "deltachat-fuzz"
 version = "0.0.0"
@@ -2154,7 +2170,7 @@ dependencies = [
  "http-body",
  "hyper",
  "pin-project-lite",
- "socket2 0.5.4",
+ "socket2 0.5.6",
  "tokio",
  "tower",
  "tower-service",
@@ -3339,7 +3355,7 @@ checksum = "055b4e778e8feb9f93c4e439f71dc2156ef13360b432b799e179a8c4cdf0b1d7"
 dependencies = [
  "bytes",
  "libc",
- "socket2 0.5.4",
+ "socket2 0.5.6",
  "tracing",
  "windows-sys 0.48.0",
 ]
@@ -3748,9 +3764,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.21.9"
+version = "0.21.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "629648aced5775d558af50b2b4c7b02983a04b312126d45eeead26e7caa498b9"
+checksum = "7fecbfb7b1444f477b345853b1fce097a2c6fb637b2bfb87e6bc5db0f043fae4"
 dependencies = [
  "ring 0.17.6",
  "rustls-webpki",
@@ -4133,12 +4149,12 @@ dependencies = [
 
 [[package]]
 name = "socket2"
-version = "0.5.4"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4031e820eb552adee9295814c0ced9e5cf38ddf1e8b7d566d6de8e2538ea989e"
+checksum = "05ffd9c0a93b7543e062e759284fcf5f5e3b098501104bfbdde4d404db792871"
 dependencies = [
  "libc",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4433,9 +4449,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.32.0"
+version = "1.37.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17ed6077ed6cd6c74735e21f37eb16dc3935f96878b1fe961074089cc80893f9"
+checksum = "1adbebffeca75fcfd058afa480fb6c0b81e165a0323f9c9d39c9697e37c46787"
 dependencies = [
  "backtrace",
  "bytes",
@@ -4445,7 +4461,7 @@ dependencies = [
  "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
- "socket2 0.5.4",
+ "socket2 0.5.6",
  "tokio-macros",
  "windows-sys 0.48.0",
 ]
@@ -4462,9 +4478,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-macros"
-version = "2.1.0"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "630bdcf245f78637c13ec01ffae6187cca34625e8c63150d424b59e55af2675e"
+checksum = "5b8a1e28f2deaa14e508979454cb3a223b10b938b45af148bc0986de36f1923b"
 dependencies = [
  "proc-macro2",
  "quote",