diff --git a/skyvern-frontend/src/routes/workflows/editor/panels/WorkflowParameterAddPanel.tsx b/skyvern-frontend/src/routes/workflows/editor/panels/WorkflowParameterAddPanel.tsx
index ad686a61..76ebc9d3 100644
--- a/skyvern-frontend/src/routes/workflows/editor/panels/WorkflowParameterAddPanel.tsx
+++ b/skyvern-frontend/src/routes/workflows/editor/panels/WorkflowParameterAddPanel.tsx
@@ -61,6 +61,7 @@ function WorkflowParameterAddPanel({ type, onClose, onSave }: Props) {
   const reservedKeys = ["current_item", "current_value", "current_index"];
   const isCloud = useContext(CloudContext);
   const [key, setKey] = useState("");
+  const hasWhitespace = /\s/.test(key);
   const [urlParameterKey, setUrlParameterKey] = useState("");
   const [description, setDescription] = useState("");
   const [bitwardenCollectionId, setBitwardenCollectionId] = useState("");
@@ -108,6 +109,11 @@ function WorkflowParameterAddPanel({ type, onClose, onSave }: Props) {
           <div className="space-y-1">
             <Label className="text-xs text-slate-300">Key</Label>
             <Input value={key} onChange={(e) => setKey(e.target.value)} />
+            {hasWhitespace && (
+              <p className="text-xs text-destructive">
+                Spaces are not allowed, consider using _
+              </p>
+            )}
           </div>
           <div className="space-y-1">
             <Label className="text-xs text-slate-300">Description</Label>
@@ -398,6 +404,14 @@ function WorkflowParameterAddPanel({ type, onClose, onSave }: Props) {
                   });
                   return;
                 }
+                if (hasWhitespace) {
+                  toast({
+                    variant: "destructive",
+                    title: "Failed to add parameter",
+                    description: "Key cannot contain whitespaces",
+                  });
+                  return;
+                }
                 if (reservedKeys.includes(key)) {
                   toast({
                     variant: "destructive",
diff --git a/skyvern-frontend/src/routes/workflows/editor/panels/WorkflowParameterEditPanel.tsx b/skyvern-frontend/src/routes/workflows/editor/panels/WorkflowParameterEditPanel.tsx
index 0034cc20..0d636ac4 100644
--- a/skyvern-frontend/src/routes/workflows/editor/panels/WorkflowParameterEditPanel.tsx
+++ b/skyvern-frontend/src/routes/workflows/editor/panels/WorkflowParameterEditPanel.tsx
@@ -73,6 +73,7 @@ function WorkflowParameterEditPanel({
 }: Props) {
   const isCloud = useContext(CloudContext);
   const [key, setKey] = useState(initialValues.key);
+  const hasWhitespace = /\s/.test(key);
   const isBitwardenCredential =
     initialValues.parameterType === "credential" &&
     parameterIsBitwardenCredential(initialValues);
@@ -192,6 +193,11 @@ function WorkflowParameterEditPanel({
           <div className="space-y-1">
             <Label className="text-xs text-slate-300">Key</Label>
             <Input value={key} onChange={(e) => setKey(e.target.value)} />
+            {hasWhitespace && (
+              <p className="text-xs text-destructive">
+                Spaces are not allowed, consider using _
+              </p>
+            )}
           </div>
           <div className="space-y-1">
             <Label className="text-xs text-slate-300">Description</Label>
@@ -480,6 +486,15 @@ function WorkflowParameterEditPanel({
                   });
                   return;
                 }
+                if (hasWhitespace) {
+                  toast({
+                    variant: "destructive",
+                    title: "Failed to save parameter",
+                    description:
+                      "Key cannot contain whitespace characters. Consider using underscores (_) instead.",
+                  });
+                  return;
+                }
                 if (type === "workflow") {
                   if (
                     parameterType === "json" &&
diff --git a/skyvern/schemas/workflows.py b/skyvern/schemas/workflows.py
index 8d95c6f0..1c6b0a56 100644
--- a/skyvern/schemas/workflows.py
+++ b/skyvern/schemas/workflows.py
@@ -3,7 +3,7 @@ from dataclasses import dataclass
 from enum import StrEnum
 from typing import Annotated, Any, Literal
 
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, field_validator
 
 from skyvern.config import settings
 from skyvern.forge.sdk.workflow.models.parameter import OutputParameter, ParameterType, WorkflowParameterType
@@ -74,6 +74,13 @@ class ParameterYAML(BaseModel, abc.ABC):
     key: str
     description: str | None = None
 
+    @field_validator("key")
+    @classmethod
+    def validate_no_whitespace(cls, v: str) -> str:
+        if any(char in v for char in [" ", "\t", "\n", "\r"]):
+            raise ValueError("Key cannot contain whitespaces")
+        return v
+
 
 class AWSSecretParameterYAML(ParameterYAML):
     # There is a mypy bug with Literal. Without the type: ignore, mypy will raise an error: