diff --git a/environments/dev-environment.yaml b/environments/dev-environment.yaml
index e9fdd604..14a05a87 100644
--- a/environments/dev-environment.yaml
+++ b/environments/dev-environment.yaml
@@ -7,6 +7,7 @@ dependencies:
 - black
 - check-manifest
 - doctr
+- filelock
 - flake8
 - flake8-builtins
 - flake8-comprehensions
diff --git a/pyproject.toml b/pyproject.toml
index e02aa54d..94e0be22 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,6 +26,7 @@ classifiers = [
 dynamic = ["version"]
 license-files = { paths = ["LICENSE"] }
 dependencies = [
+    # conda-lock dependencies
     "click >=8.0",
     "click-default-group",
     "ensureconda >=1.3",
@@ -33,11 +34,11 @@ dependencies = [
     "jinja2",
     "pydantic >=1.10",
     "pyyaml >= 5.1",
-    "ruamel.yaml",
     'tomli; python_version<"3.11"',
     "typing-extensions",
+    # conda dependencies
+    "ruamel.yaml",
     "toolz >=0.12.0,<1.0.0",
-    "filelock >=3.8.0",
     # The following dependencies were added in the process of vendoring Poetry 1.1.15.
     # poetry:
     "cachecontrol[filecache] >=0.12.9",