diff --git a/python/rustac/rustac.pyi b/python/rustac/rustac.pyi
index 5871ca5..69ee246 100644
--- a/python/rustac/rustac.pyi
+++ b/python/rustac/rustac.pyi
@@ -18,7 +18,7 @@ class DuckdbClient:
         *,
         extension_directory: Path | None = None,
         extensions: list[str] | None = None,
-        install_spatial: bool = True,
+        install_extensions: bool = True,
         use_hive_partitioning: bool = False,
     ) -> None:
         """Creates a new duckdb client.
@@ -26,7 +26,7 @@ class DuckdbClient:
         Args:
             extension_directory: A non-standard extension directory to use.
             extensions: A list of extensions to LOAD on client initialization.
-            install_spatial: Whether to install the spatial extension on client initialization.
+            install_extensions: Whether to install the spatial and icu extensions on client initialization.
             use_hive_partitioning: Whether to use hive partitioning for geoparquet queries.
         """
 
diff --git a/src/duckdb.rs b/src/duckdb.rs
index 02a3b62..1e77425 100644
--- a/src/duckdb.rs
+++ b/src/duckdb.rs
@@ -19,11 +19,11 @@ pub struct DuckdbClient(Mutex<Client>);
 #[pymethods]
 impl DuckdbClient {
     #[new]
-    #[pyo3(signature = (*, extension_directory=None, extensions=Vec::new(), install_spatial=true, use_hive_partitioning=false))]
+    #[pyo3(signature = (*, extension_directory=None, extensions=Vec::new(), install_extensions=true, use_hive_partitioning=false))]
     fn new(
         extension_directory: Option<PathBuf>,
         extensions: Vec<String>,
-        install_spatial: bool,
+        install_extensions: bool,
         use_hive_partitioning: bool,
     ) -> Result<DuckdbClient> {
         let connection = Connection::open_in_memory()?;
@@ -33,13 +33,15 @@ impl DuckdbClient {
                 [extension_directory.to_string_lossy()],
             )?;
         }
-        if install_spatial {
+        if install_extensions {
             connection.execute("INSTALL spatial", [])?;
+            connection.execute("INSTALL icu", [])?;
         }
         for extension in extensions {
             connection.execute(&format!("LOAD '{}'", extension), [])?;
         }
         connection.execute("LOAD spatial", [])?;
+        connection.execute("LOAD icu", [])?;
         let mut client = Client::from(connection);
         client.use_hive_partitioning = use_hive_partitioning;
         Ok(DuckdbClient(Mutex::new(client)))
diff --git a/tests/test_duckdb.py b/tests/test_duckdb.py
index f163ff4..d7ceb64 100644
--- a/tests/test_duckdb.py
+++ b/tests/test_duckdb.py
@@ -52,16 +52,18 @@ def test_custom_extension_directory(extension_directory: Path) -> None:
 
 def test_no_install(tmp_path: Path) -> None:
     with pytest.raises(RustacError):
-        DuckdbClient(extension_directory=tmp_path, install_spatial=False)
+        DuckdbClient(extension_directory=tmp_path, install_extensions=False)
 
 
 def test_extensions(extension_directory: Path, tmp_path: Path) -> None:
     # Ensure we've fetched the extension
     DuckdbClient(extension_directory=extension_directory)
 
-    extension = next(extension_directory.glob("**/spatial.duckdb_extension"))
+    extensions = list(str(e) for e in extension_directory.glob("**/*.duckdb_extension"))
     client = DuckdbClient(
-        extensions=[str(extension)], extension_directory=tmp_path, install_spatial=False
+        extensions=extensions,
+        extension_directory=tmp_path,
+        install_extensions=False,
     )
     client.search("data/100-sentinel-2-items.parquet")