diff --git a/altair/utils/_importers.py b/altair/utils/_importers.py
index 6ee41351d..d8bf20047 100644
--- a/altair/utils/_importers.py
+++ b/altair/utils/_importers.py
@@ -29,7 +29,7 @@ def import_vegafusion() -> ModuleType:
 
 
 def import_vl_convert() -> ModuleType:
-    min_version = "0.14.0"
+    min_version = "1.0.0"
     try:
         version = importlib_version("vl-convert-python")
         if Version(version) < Version(min_version):
diff --git a/pyproject.toml b/pyproject.toml
index 527d03f09..af321ba55 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,7 @@ dev = [
     "pytest-cov",
     "m2r",
     "vega_datasets",
-    "vl-convert-python>=0.14.0",
+    "vl-convert-python>=1.0.0",
     "mypy",
     "pandas-stubs",
     "types-jsonschema",