diff --git a/Cargo.lock b/Cargo.lock
index 2f6d7291b..7791e1cc4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -287,16 +287,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
-[[package]]
-name = "chashmap"
-version = "2.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff41a3c2c1e39921b9003de14bf0439c7b63a9039637c291e1a64925d8ddfa45"
-dependencies = [
- "owning_ref",
- "parking_lot 0.4.8",
-]
-
 [[package]]
 name = "chrono"
 version = "0.4.39"
@@ -553,6 +543,20 @@ dependencies = [
  "petgraph",
 ]
 
+[[package]]
+name = "dashmap"
+version = "6.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5041cc499144891f3790297212f32a74fb938e5136a14943f338ef9e0ae276cf"
+dependencies = [
+ "cfg-if",
+ "crossbeam-utils",
+ "hashbrown 0.14.5",
+ "lock_api",
+ "once_cell",
+ "parking_lot_core",
+]
+
 [[package]]
 name = "deflate64"
 version = "0.1.9"
@@ -768,12 +772,6 @@ dependencies = [
  "percent-encoding",
 ]
 
-[[package]]
-name = "fuchsia-cprng"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
-
 [[package]]
 name = "futures-channel"
 version = "0.3.31"
@@ -905,6 +903,12 @@ dependencies = [
  "crunchy",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.14.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
+
 [[package]]
 name = "hashbrown"
 version = "0.15.2"
@@ -1006,7 +1010,7 @@ dependencies = [
  "httpdate",
  "itoa",
  "pin-project-lite",
- "smallvec 1.13.2",
+ "smallvec",
  "tokio",
  "want",
 ]
@@ -1142,7 +1146,7 @@ dependencies = [
  "icu_normalizer_data",
  "icu_properties",
  "icu_provider",
- "smallvec 1.13.2",
+ "smallvec",
  "utf16_iter",
  "utf8_iter",
  "write16",
@@ -1211,7 +1215,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "686f825264d630750a544639377bae737628043f20d38bbc029e8f29ea968a7e"
 dependencies = [
  "idna_adapter",
- "smallvec 1.13.2",
+ "smallvec",
  "utf8_iter",
 ]
 
@@ -1252,7 +1256,7 @@ dependencies = [
  "imageflow_helpers",
  "libc",
  "regex",
- "smallvec 1.13.2",
+ "smallvec",
 ]
 
 [[package]]
@@ -1276,10 +1280,10 @@ dependencies = [
  "blake2-rfc",
  "bytemuck",
  "byteorder",
- "chashmap",
  "chrono",
  "criterion",
  "daggy",
+ "dashmap",
  "dssim",
  "evalchroma",
  "flate2",
@@ -1310,14 +1314,14 @@ dependencies = [
  "multiversion",
  "num 0.4.3",
  "petgraph",
- "rand 0.8.5",
+ "rand",
  "rgb",
  "rustface",
  "serde",
  "serde_derive",
  "serde_json",
  "slotmap",
- "smallvec 1.13.2",
+ "smallvec",
  "threadpool",
  "time",
  "twox-hash",
@@ -1340,14 +1344,14 @@ dependencies = [
  "libc",
  "mimalloc",
  "mockito",
- "rand 0.8.5",
+ "rand",
  "regex",
  "rgb",
  "serde",
  "serde_derive",
  "serde_json",
  "sha2",
- "smallvec 1.13.2",
+ "smallvec",
  "time",
  "twox-hash",
  "unicase",
@@ -1438,7 +1442,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8c9c992b02b5b4c94ea26e32fe5bccb7aa7d9f390ab5c1221ff895bc7ea8b652"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.15.2",
 ]
 
 [[package]]
@@ -1681,12 +1685,6 @@ name = "macro-attr"
 version = "0.2.1"
 source = "git+https://github.com/DanielKeep/rust-custom-derive.git#1252f258cdb9b7c9867f937c52c2f5c0e69a9c03"
 
-[[package]]
-name = "maybe-uninit"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
-
 [[package]]
 name = "memchr"
 version = "2.7.4"
@@ -1744,7 +1742,7 @@ dependencies = [
  "hyper",
  "hyper-util",
  "log",
- "rand 0.8.5",
+ "rand",
  "regex",
  "serde_json",
  "serde_urlencoded",
@@ -2053,25 +2051,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4f0bc569ca0974cb90125f52cf76f7b6ad3a072301beba78eb0aa4174c4964ed"
 
-[[package]]
-name = "owning_ref"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdf84f41639e037b484f93433aa3897863b561ed65c6e59c7073d7c561710f37"
-dependencies = [
- "stable_deref_trait",
-]
-
-[[package]]
-name = "parking_lot"
-version = "0.4.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "149d8f5b97f3c1133e3cfcd8886449959e856b557ff281e292b733d7c69e005e"
-dependencies = [
- "owning_ref",
- "parking_lot_core 0.2.14",
-]
-
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -2079,19 +2058,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
 dependencies = [
  "lock_api",
- "parking_lot_core 0.9.10",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4db1a8ccf734a7bce794cc19b3df06ed87ab2f3907036b693c68f56b4d4537fa"
-dependencies = [
- "libc",
- "rand 0.4.6",
- "smallvec 0.6.14",
- "winapi",
+ "parking_lot_core",
 ]
 
 [[package]]
@@ -2103,7 +2070,7 @@ dependencies = [
  "cfg-if",
  "libc",
  "redox_syscall",
- "smallvec 1.13.2",
+ "smallvec",
  "windows-targets",
 ]
 
@@ -2218,19 +2185,6 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "rand"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "552840b97013b1a26992c11eac34bdd778e464601a4c2054b5f0bff7c6761293"
-dependencies = [
- "fuchsia-cprng",
- "libc",
- "rand_core 0.3.1",
- "rdrand",
- "winapi",
-]
-
 [[package]]
 name = "rand"
 version = "0.8.5"
@@ -2239,7 +2193,7 @@ checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "libc",
  "rand_chacha",
- "rand_core 0.6.4",
+ "rand_core",
 ]
 
 [[package]]
@@ -2249,24 +2203,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core 0.6.4",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
-dependencies = [
- "rand_core 0.4.2",
+ "rand_core",
 ]
 
-[[package]]
-name = "rand_core"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
-
 [[package]]
 name = "rand_core"
 version = "0.6.4"
@@ -2296,15 +2235,6 @@ dependencies = [
  "crossbeam-utils",
 ]
 
-[[package]]
-name = "rdrand"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
-dependencies = [
- "rand_core 0.3.1",
-]
-
 [[package]]
 name = "redox_syscall"
 version = "0.5.8"
@@ -2671,15 +2601,6 @@ dependencies = [
  "version_check",
 ]
 
-[[package]]
-name = "smallvec"
-version = "0.6.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b97fcaeba89edba30f044a10c6a3cc39df9c3f17d7cd829dd1446cab35f890e0"
-dependencies = [
- "maybe-uninit",
-]
-
 [[package]]
 name = "smallvec"
 version = "1.13.2"
@@ -2880,7 +2801,7 @@ dependencies = [
  "bytes",
  "libc",
  "mio",
- "parking_lot 0.12.3",
+ "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
  "socket2",
@@ -3024,7 +2945,7 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e7b17f197b3050ba473acf9181f7b1d3b66d1cf7356c6cc57886662276e65908"
 dependencies = [
- "rand 0.8.5",
+ "rand",
 ]
 
 [[package]]
@@ -3220,22 +3141,6 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "53a85b86a771b1c87058196170769dd264f66c0782acf1ae6cc51bfd64b39082"
 
-[[package]]
-name = "winapi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-dependencies = [
- "winapi-i686-pc-windows-gnu",
- "winapi-x86_64-pc-windows-gnu",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-
 [[package]]
 name = "winapi-util"
 version = "0.1.9"
@@ -3245,12 +3150,6 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
 [[package]]
 name = "windows-core"
 version = "0.52.0"
@@ -3521,7 +3420,7 @@ dependencies = [
  "lzma-rs",
  "memchr",
  "pbkdf2",
- "rand 0.8.5",
+ "rand",
  "sha1",
  "thiserror",
  "time",
diff --git a/imageflow_core/Cargo.toml b/imageflow_core/Cargo.toml
index 33857764d..990cbba1c 100644
--- a/imageflow_core/Cargo.toml
+++ b/imageflow_core/Cargo.toml
@@ -49,7 +49,7 @@ jpeg-decoder ="0.3.1"
 
 lcms2 = "6"
 lcms2-sys = "4"
-chashmap = "2.2"
+dashmap = "6.1.0"
 
 getopts ="0.2"
 byteorder="1"
diff --git a/imageflow_core/src/codecs/color_transform_cache.rs b/imageflow_core/src/codecs/color_transform_cache.rs
index d667df618..2638d986b 100644
--- a/imageflow_core/src/codecs/color_transform_cache.rs
+++ b/imageflow_core/src/codecs/color_transform_cache.rs
@@ -55,8 +55,8 @@ pub struct ColorTransformCache{
 }
 
 lazy_static!{
-    static ref PROFILE_TRANSFORMS: ::chashmap::CHashMap<u64, Transform<u32,u32,ThreadContext, DisallowCache>> = ::chashmap::CHashMap::with_capacity(4);
-    static ref GAMA_TRANSFORMS: ::chashmap::CHashMap<u64, Transform<u32,u32, ThreadContext,DisallowCache>> = ::chashmap::CHashMap::with_capacity(4);
+    static ref PROFILE_TRANSFORMS: ::dashmap::DashMap<u64, Transform<u32,u32,ThreadContext, DisallowCache>> = ::dashmap::DashMap::with_capacity(4);
+    static ref GAMA_TRANSFORMS: ::dashmap::DashMap<u64, Transform<u32,u32, ThreadContext,DisallowCache>> = ::dashmap::DashMap::with_capacity(4);
 
 }
 
diff --git a/imageflow_core/src/lib.rs b/imageflow_core/src/lib.rs
index f42c61607..0fa50693c 100644
--- a/imageflow_core/src/lib.rs
+++ b/imageflow_core/src/lib.rs
@@ -35,7 +35,7 @@ extern crate uuid;
 extern crate imagequant;
 extern crate gif;
 extern crate smallvec;
-extern crate chashmap;
+extern crate dashmap;
 extern crate rgb;
 extern crate imgref;
 extern crate lodepng;
diff --git a/imageflow_helpers/src/unused/cache.rs b/imageflow_helpers/src/unused/cache.rs
index 63b921ade..852d158e4 100644
--- a/imageflow_helpers/src/unused/cache.rs
+++ b/imageflow_helpers/src/unused/cache.rs
@@ -155,7 +155,7 @@ pub trait PersistentStringCache: Sync + Send{
 pub struct WriteThroughCache{
     prefix: &'static str,
     // Would be nice if we could lookup by &str instead of &String
-    cache: ::chashmap::CHashMap<String, String>,
+    cache: ::dashmap::DashMap<String, String>,
     disk: &'static DiskStorage
 }
 
@@ -164,7 +164,7 @@ impl WriteThroughCache{
     pub fn new(prefix: &'static str, disk: &'static DiskStorage) -> Self{
         WriteThroughCache{
             prefix,
-            cache: ::chashmap::CHashMap::new(),
+            cache: ::dashmap::DashMap::new(),
             disk
         }
     }
diff --git a/imageflow_helpers/src/unused/mod.rs b/imageflow_helpers/src/unused/mod.rs
index 86eaf8265..acd5d030e 100644
--- a/imageflow_helpers/src/unused/mod.rs
+++ b/imageflow_helpers/src/unused/mod.rs
@@ -107,8 +107,8 @@ impl Endpoint for LicenseEndpoint{
 
 pub struct LicenseManagerSingleton{
     licenses: AppendList<License>,
-    aliases_to_id: ::chashmap::CHashMap<Cow<'static, str>,String>,
-    cached: ::chashmap::CHashMap<Cow<'static, str>,LicenseBlob>,
+    aliases_to_id: ::dashmap::DashMap<Cow<'static, str>,String>,
+    cached: ::dashmap::DashMap<Cow<'static, str>,LicenseBlob>,
     #[allow(dead_code)]
     sink: IssueSink,
     trusted_keys: &'static [RSADecryptPublic],
@@ -141,8 +141,8 @@ impl LicenseManagerSingleton{
             trusted_keys,
             clock,
             cache,
-            cached: ::chashmap::CHashMap::new(),
-            aliases_to_id: ::chashmap::CHashMap::new(),
+            cached: ::dashmap::DashMap::new(),
+            aliases_to_id: ::dashmap::DashMap::new(),
             licenses: AppendList::new(),
             sink: IssueSink::new("LicenseManager"),
             created,
@@ -236,7 +236,7 @@ impl LicenseManagerSingleton{
         self.licenses.iter().find(|l| l.id().eq_ignore_ascii_case(id))
     }
 
-    pub fn cached_remote(&self, id: &str) -> Option<::chashmap::ReadGuard<Cow<'static,str>,LicenseBlob>>{
+    pub fn cached_remote(&self, id: &str) -> Option<::dashmap::ReadGuard<Cow<'static,str>,LicenseBlob>>{
 
         //
         self.cached.get(&Cow::Owned(id.to_owned()))
diff --git a/imageflow_helpers/src/unused/support.rs b/imageflow_helpers/src/unused/support.rs
index 3511d088e..f37b22172 100644
--- a/imageflow_helpers/src/unused/support.rs
+++ b/imageflow_helpers/src/unused/support.rs
@@ -48,13 +48,13 @@ impl fmt::Display for IssueSink {
 //#[allow(dead_code)]
 //pub struct IssueSync{
 //    source: &'static str,
-//    dict: ::chashmap::CHashMap<u64, Issue>
+//    dict: ::dashmap::DashMap<u64, Issue>
 //}
 //impl IssueSync {
 //    pub fn new(source: &'static str) -> Self {
 //        IssueSync {
 //            source,
-//            dict: ::chashmap::CHashMap::new()
+//            dict: ::dashmap::DashMap::new()
 //        }
 //    }
 //    pub fn error(&self, msg: String, detail: String) {
diff --git a/imageflow_helpers/src/unused/test/support.rs b/imageflow_helpers/src/unused/test/support.rs
index dd0572bdd..4547be678 100644
--- a/imageflow_helpers/src/unused/test/support.rs
+++ b/imageflow_helpers/src/unused/test/support.rs
@@ -44,12 +44,12 @@ impl AppClock for OffsetClock{
 }
 
 pub struct StringMemCache{
-    cache: ::chashmap::CHashMap<String, String>,
+    cache: ::dashmap::DashMap<String, String>,
 }
 impl StringMemCache{
     pub fn new() -> Self{
         StringMemCache{
-            cache: ::chashmap::CHashMap::new()
+            cache: ::dashmap::DashMap::new()
         }
     }
     pub fn into_cache(self) -> Box<dyn PersistentStringCache + Send + Sync>{