diff --git a/pyproject.toml b/pyproject.toml
index c10a8cd..6522b0b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ classifiers = [
 ]
 dependencies = [
     "httpx>=0.24.0",
-    "pydantic>=2.0.0",
+    "pydantic>=1.8.0",
     "nanoid>=2.0.0",
 ]
 
diff --git a/src/lingodotdev/engine.py b/src/lingodotdev/engine.py
index 64bfbb0..8b11aed 100644
--- a/src/lingodotdev/engine.py
+++ b/src/lingodotdev/engine.py
@@ -10,7 +10,7 @@
 
 import httpx
 from nanoid import generate
-from pydantic import BaseModel, Field, field_validator
+from pydantic import BaseModel, Field, validator
 
 
 class EngineConfig(BaseModel):
@@ -21,7 +21,7 @@ class EngineConfig(BaseModel):
     batch_size: int = Field(default=25, ge=1, le=250)
     ideal_batch_item_size: int = Field(default=250, ge=1, le=2500)
 
-    @field_validator("api_url")
+    @validator("api_url")
     @classmethod
     def validate_api_url(cls, v: str) -> str:
         if not v.startswith(("http://", "https://")):