diff --git a/CHANGELOG.md b/CHANGELOG.md
index 23bb456..8603173 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ use patch releases for compatibility fixes instead.
 
 ## Unreleased
 
+### Fixed
+
+- Numbers are now allowed in `command` and `arguments` fields for experiment specs.
+
 ## [v1.26.4](https://github.com/allenai/beaker-py/releases/tag/v1.26.4) - 2024-04-10
 
 ### Fixed
diff --git a/beaker/data_model/experiment_spec.py b/beaker/data_model/experiment_spec.py
index 37311e0..b2df33f 100644
--- a/beaker/data_model/experiment_spec.py
+++ b/beaker/data_model/experiment_spec.py
@@ -348,7 +348,7 @@ class TaskSpec(BaseModel, frozen=False):
     It must be unique among all tasks within its experiment.
     """
 
-    command: Optional[List[str]] = None
+    command: Optional[List[Union[str, int, float]]] = None
     """
     Command is the full shell command to run as a sequence of separate arguments.
 
@@ -358,7 +358,7 @@ class TaskSpec(BaseModel, frozen=False):
     Example: ``["python", "-u", "main.py"]``
     """
 
-    arguments: Optional[List[str]] = None
+    arguments: Optional[List[Union[str, int, float]]] = None
     """
     Arguments are appended to the command and replace default arguments such as Docker's ``CMD`` directive.