diff --git a/packages/aws-sdk-signers/pyproject.toml b/packages/aws-sdk-signers/pyproject.toml
index 4677bd433..d420bc186 100644
--- a/packages/aws-sdk-signers/pyproject.toml
+++ b/packages/aws-sdk-signers/pyproject.toml
@@ -1,5 +1,5 @@
 [project]
-name = "aws_sdk_signers"
+name = "aws-sdk-signers"
 version = "0.0.2"
 requires-python = ">=3.12"
 authors = [
diff --git a/packages/smithy-core/pyproject.toml b/packages/smithy-core/pyproject.toml
index d1ee1d4ad..1c2de4670 100644
--- a/packages/smithy-core/pyproject.toml
+++ b/packages/smithy-core/pyproject.toml
@@ -1,5 +1,5 @@
 [project]
-name = "smithy_core"
+name = "smithy-core"
 version = "0.0.1"
 description = "Core components for implementing Smithy tooling in Python."
 readme = "README.md"
diff --git a/packages/smithy-http/pyproject.toml b/packages/smithy-http/pyproject.toml
index c63890900..bd9ed9e66 100644
--- a/packages/smithy-http/pyproject.toml
+++ b/packages/smithy-http/pyproject.toml
@@ -1,5 +1,5 @@
 [project]
-name = "smithy_http"
+name = "smithy-http"
 version = "0.0.1"
 description = "HTTP components for Smithy tooling."
 readme = "README.md"