diff --git a/flow-message/Cargo.lock b/flow-message/Cargo.lock
index 8089072..4ed8459 100644
--- a/flow-message/Cargo.lock
+++ b/flow-message/Cargo.lock
@@ -29,18 +29,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
-[[package]]
-name = "cross"
-version = "0.1.0"
-dependencies = [
- "byteorder",
- "dashmap",
- "enum-as-inner",
- "im",
- "paste 1.0.5",
- "pyo3",
-]
-
 [[package]]
 name = "dashmap"
 version = "4.0.2"
@@ -63,6 +51,19 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "flow-message"
+version = "0.3.5"
+dependencies = [
+ "byteorder",
+ "dashmap",
+ "enum-as-inner",
+ "im",
+ "libc",
+ "paste 1.0.5",
+ "pyo3",
+]
+
 [[package]]
 name = "heck"
 version = "0.3.3"
@@ -83,9 +84,9 @@ dependencies = [
 
 [[package]]
 name = "im"
-version = "15.0.0"
+version = "15.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "111c1983f3c5bb72732df25cddacee9b546d08325fb584b5ebd38148be7b0246"
+checksum = "d0acd33ff0285af998aaf9b57342af478078f53492322fafc47450e09397e0e9"
 dependencies = [
  "bitmaps",
  "rand_core",
@@ -225,9 +226,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.14.5"
+version = "0.15.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35100f9347670a566a67aa623369293703322bb9db77d99d7df7313b575ae0c8"
+checksum = "d41d50a7271e08c7c8a54cd24af5d62f73ee3a6f6a314215281ebdec421d5752"
 dependencies = [
  "cfg-if",
  "indoc",
@@ -241,18 +242,18 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.14.5"
+version = "0.15.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d12961738cacbd7f91b7c43bc25cfeeaa2698ad07a04b3be0aa88b950865738f"
+checksum = "779239fc40b8e18bc8416d3a37d280ca9b9fb04bda54b98037bb6748595c2410"
 dependencies = [
  "once_cell",
 ]
 
 [[package]]
 name = "pyo3-macros"
-version = "0.14.5"
+version = "0.15.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc0bc5215d704824dfddddc03f93cb572e1155c68b6761c37005e1c288808ea8"
+checksum = "00b247e8c664be87998d8628e86f282c25066165f1f8dda66100c48202fdb93a"
 dependencies = [
  "pyo3-macros-backend",
  "quote",
@@ -261,9 +262,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.14.5"
+version = "0.15.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71623fc593224afaab918aa3afcaf86ed2f43d34f6afde7f3922608f253240df"
+checksum = "5a8c2812c412e00e641d99eeb79dd478317d981d938aa60325dfa7157b607095"
 dependencies = [
  "proc-macro2",
  "pyo3-build-config",
@@ -282,15 +283,15 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.5.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
 
 [[package]]
 name = "rand_xoshiro"
-version = "0.4.0"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9fcdd2e881d02f1d9390ae47ad8e5696a9e4be7b547a1da2afbc61973217004"
+checksum = "6f97cdb2a36ed4183de61b2f824cc45c9f1037f28afe0a322e9fff4c108b5aaa"
 dependencies = [
  "rand_core",
 ]
diff --git a/flow-message/Cargo.toml b/flow-message/Cargo.toml
index 35152f4..82c313d 100644
--- a/flow-message/Cargo.toml
+++ b/flow-message/Cargo.toml
@@ -13,7 +13,7 @@ c = ["libc"]
 byteorder = {version="1.4", optional=true}
 dashmap = {version="4.0", optional=true}
 enum-as-inner = {version="0.3", optional=true}
-im = {version="15.0", optional=true}
+im = {version="15.1", optional=true}
 paste = {version="1.0",optional=true}
 pyo3 = {version="0.15", features=["abi3"], optional=true}
 libc = {version="0.2",optional=true}