diff --git a/Cargo.lock b/Cargo.lock
index 459efe13cc0..889b5bc19a4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5235,9 +5235,9 @@ checksum = "3d3067d79b975e8844ca9eb072e16b31c3c1c36928edf9c6789548c524d0d954"
 
 [[package]]
 name = "iddqd"
-version = "0.3.18"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "616230c7d641ef971a3a5bfcc654c6b7524ab9c9fb665693c6a397dba9a14aca"
+checksum = "b1fb967ac6b9edb2b5bd91496fc95fdf5eee0772aa31aca370766975f7e57962"
 dependencies = [
  "allocator-api2",
  "daft",
@@ -5246,7 +5246,6 @@ dependencies = [
  "hashbrown 0.16.1",
  "proptest",
  "ref-cast",
- "rustc-hash",
  "schemars 0.8.22",
  "serde_core",
  "serde_json",
@@ -9468,7 +9467,6 @@ dependencies = [
  "reqwest 0.12.28",
  "reqwest 0.13.2",
  "rsa",
- "rustc-hash",
  "rustix 0.38.44",
  "rustix 1.1.3",
  "rustls 0.23.37",
@@ -12919,7 +12917,7 @@ dependencies = [
 [[package]]
 name = "scim2-rs"
 version = "0.1.0"
-source = "git+https://github.com/oxidecomputer/scim2-rs?rev=018ae6f7bd752cd9b2124887e00c93c6b4244103#018ae6f7bd752cd9b2124887e00c93c6b4244103"
+source = "git+https://github.com/oxidecomputer/scim2-rs?rev=163606c052ee30b16dfab282fca721dd81e0868a#163606c052ee30b16dfab282fca721dd81e0868a"
 dependencies = [
  "anyhow",
  "chrono",
@@ -12938,7 +12936,7 @@ dependencies = [
 [[package]]
 name = "scim2-test-client"
 version = "0.1.0"
-source = "git+https://github.com/oxidecomputer/scim2-rs?rev=018ae6f7bd752cd9b2124887e00c93c6b4244103#018ae6f7bd752cd9b2124887e00c93c6b4244103"
+source = "git+https://github.com/oxidecomputer/scim2-rs?rev=163606c052ee30b16dfab282fca721dd81e0868a#163606c052ee30b16dfab282fca721dd81e0868a"
 dependencies = [
  "anyhow",
  "clap",
@@ -14190,7 +14188,7 @@ version = "0.8.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1c97747dbf44bb1ca44a561ece23508e99cb592e862f22222dcf42f51d1e451"
 dependencies = [
- "heck 0.4.1",
+ "heck 0.5.0",
  "proc-macro2",
  "quote",
  "syn 2.0.117",
diff --git a/Cargo.toml b/Cargo.toml
index a8cc82cd97b..85c4009cbd9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -569,7 +569,7 @@ hyper = "1.6.0"
 hyper-util = "0.1.16"
 hyper-rustls = "0.27.7"
 hyper-staticfile = "0.10.1"
-iddqd = { version = "0.3.18", features = ["daft", "serde", "schemars08"] }
+iddqd = { version = "0.4.1", features = ["daft", "serde", "schemars08"] }
 illumos-utils = { path = "illumos-utils" }
 iana-time-zone = "0.1.63"
 indent_write = "2.2.0"
@@ -896,8 +896,8 @@ newtype-uuid = { version = "1.3.2", default-features = false }
 newtype-uuid-macros = "0.1.0"
 omicron-uuid-kinds = { path = "uuid-kinds", features = ["serde", "schemars08", "uuid-v4"] }
 
-scim2-rs = { git = "https://github.com/oxidecomputer/scim2-rs", rev = "018ae6f7bd752cd9b2124887e00c93c6b4244103" }
-scim2-test-client = { git = "https://github.com/oxidecomputer/scim2-rs", rev = "018ae6f7bd752cd9b2124887e00c93c6b4244103" }
+scim2-rs = { git = "https://github.com/oxidecomputer/scim2-rs", rev = "163606c052ee30b16dfab282fca721dd81e0868a" }
+scim2-test-client = { git = "https://github.com/oxidecomputer/scim2-rs", rev = "163606c052ee30b16dfab282fca721dd81e0868a" }
 
 # NOTE: The test profile inherits from the dev profile, so settings under
 # profile.dev get inherited. AVOID setting anything under profile.test: that
diff --git a/workspace-hack/Cargo.toml b/workspace-hack/Cargo.toml
index 87e4e064d16..0a164e8099a 100644
--- a/workspace-hack/Cargo.toml
+++ b/workspace-hack/Cargo.toml
@@ -70,7 +70,7 @@ hex = { version = "0.4.3", features = ["serde"] }
 hickory-proto = { version = "0.25.2", features = ["serde", "text-parsing"] }
 hmac = { version = "0.12.1", default-features = false, features = ["reset"] }
 hyper = { version = "1.8.1", features = ["full"] }
-iddqd = { version = "0.3.18", features = ["daft", "proptest", "schemars08"] }
+iddqd = { version = "0.4.1", features = ["daft", "proptest", "schemars08"] }
 idna = { version = "1.1.0" }
 indexmap = { version = "2.14.0", features = ["serde"] }
 inout = { version = "0.1.4", default-features = false, features = ["std"] }
@@ -114,7 +114,6 @@ regex-syntax = { version = "0.8.10" }
 reqwest-594e8ee84c453af0 = { package = "reqwest", version = "0.13.2", default-features = false, features = ["blocking", "cookies", "http2", "json", "query", "rustls", "stream"] }
 reqwest-5ef9efb8ec2df382 = { package = "reqwest", version = "0.12.28", features = ["blocking", "json", "rustls-tls", "stream"] }
 rsa = { version = "0.9.10", features = ["serde", "sha2"] }
-rustc-hash = { version = "2.1.1" }
 rustls = { version = "0.23.37", features = ["ring"] }
 rustls-webpki = { version = "0.103.9", default-features = false, features = ["aws-lc-rs", "ring", "std"] }
 schemars = { version = "0.8.22", features = ["bytes", "chrono", "semver", "url", "uuid1"] }
@@ -218,7 +217,7 @@ hex = { version = "0.4.3", features = ["serde"] }
 hickory-proto = { version = "0.25.2", features = ["serde", "text-parsing"] }
 hmac = { version = "0.12.1", default-features = false, features = ["reset"] }
 hyper = { version = "1.8.1", features = ["full"] }
-iddqd = { version = "0.3.18", features = ["daft", "proptest", "schemars08"] }
+iddqd = { version = "0.4.1", features = ["daft", "proptest", "schemars08"] }
 idna = { version = "1.1.0" }
 indexmap = { version = "2.14.0", features = ["serde"] }
 inout = { version = "0.1.4", default-features = false, features = ["std"] }
@@ -262,7 +261,6 @@ regex-syntax = { version = "0.8.10" }
 reqwest-594e8ee84c453af0 = { package = "reqwest", version = "0.13.2", default-features = false, features = ["blocking", "cookies", "http2", "json", "query", "rustls", "stream"] }
 reqwest-5ef9efb8ec2df382 = { package = "reqwest", version = "0.12.28", features = ["blocking", "json", "rustls-tls", "stream"] }
 rsa = { version = "0.9.10", features = ["serde", "sha2"] }
-rustc-hash = { version = "2.1.1" }
 rustls = { version = "0.23.37", features = ["ring"] }
 rustls-webpki = { version = "0.103.9", default-features = false, features = ["aws-lc-rs", "ring", "std"] }
 schemars = { version = "0.8.22", features = ["bytes", "chrono", "semver", "url", "uuid1"] }