diff --git a/CHANGES.md b/CHANGES.md
index 5899749f2..0376b4e9d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -10,6 +10,8 @@
 
 ### Fixed
 
+* Allow url encoded values for `query` in GET requests ([#504](https://github.com/stac-utils/stac-fastapi/pull/504))
+
 ## [2.4.3]
 
 ### Added
@@ -22,7 +24,6 @@
 
 ### Fixed
 
-
 ## [2.4.2]
 
 ### Added
diff --git a/stac_fastapi/pgstac/stac_fastapi/pgstac/core.py b/stac_fastapi/pgstac/stac_fastapi/pgstac/core.py
index 9f9f0a093..9b194f70e 100644
--- a/stac_fastapi/pgstac/stac_fastapi/pgstac/core.py
+++ b/stac_fastapi/pgstac/stac_fastapi/pgstac/core.py
@@ -2,7 +2,7 @@
 import re
 from datetime import datetime
 from typing import Any, Dict, List, Optional, Union
-from urllib.parse import urljoin
+from urllib.parse import unquote_plus, urljoin
 
 import attr
 import orjson
@@ -372,7 +372,7 @@ async def get_search(
             "bbox": bbox,
             "limit": limit,
             "token": token,
-            "query": orjson.loads(query) if query else query,
+            "query": orjson.loads(unquote_plus(query)) if query else query,
         }
 
         if filter:
diff --git a/stac_fastapi/pgstac/tests/api/test_api.py b/stac_fastapi/pgstac/tests/api/test_api.py
index 6a8bc2776..1f7fbe371 100644
--- a/stac_fastapi/pgstac/tests/api/test_api.py
+++ b/stac_fastapi/pgstac/tests/api/test_api.py
@@ -1,5 +1,7 @@
 from datetime import datetime, timedelta
+from urllib.parse import quote_plus
 
+import orjson
 import pytest
 
 STAC_CORE_ROUTES = [
@@ -102,6 +104,12 @@ async def test_app_query_extension(load_test_data, app_client, load_test_collect
     resp_json = resp.json()
     assert len(resp_json["features"]) == 1
 
+    params["query"] = quote_plus(orjson.dumps(params["query"]))
+    resp = await app_client.get("/search", params=params)
+    assert resp.status_code == 200
+    resp_json = resp.json()
+    assert len(resp_json["features"]) == 1
+
 
 async def test_app_query_extension_limit_1(
     load_test_data, app_client, load_test_collection
diff --git a/stac_fastapi/sqlalchemy/stac_fastapi/sqlalchemy/core.py b/stac_fastapi/sqlalchemy/stac_fastapi/sqlalchemy/core.py
index 16a4c856e..68c96f2de 100644
--- a/stac_fastapi/sqlalchemy/stac_fastapi/sqlalchemy/core.py
+++ b/stac_fastapi/sqlalchemy/stac_fastapi/sqlalchemy/core.py
@@ -4,7 +4,7 @@
 import operator
 from datetime import datetime
 from typing import List, Optional, Set, Type, Union
-from urllib.parse import urlencode, urljoin
+from urllib.parse import unquote_plus, urlencode, urljoin
 
 import attr
 import geoalchemy2 as ga
@@ -243,7 +243,7 @@ def get_search(
             "bbox": bbox,
             "limit": limit,
             "token": token,
-            "query": json.loads(query) if query else query,
+            "query": json.loads(unquote_plus(query)) if query else query,
         }
 
         if datetime:
diff --git a/stac_fastapi/sqlalchemy/tests/api/test_api.py b/stac_fastapi/sqlalchemy/tests/api/test_api.py
index 2cfec175c..de4f5d734 100644
--- a/stac_fastapi/sqlalchemy/tests/api/test_api.py
+++ b/stac_fastapi/sqlalchemy/tests/api/test_api.py
@@ -1,4 +1,7 @@
 from datetime import datetime, timedelta
+from urllib.parse import quote_plus
+
+import orjson
 
 from ..conftest import MockStarletteRequest
 
@@ -150,6 +153,12 @@ def test_app_query_extension_gt(load_test_data, app_client, postgres_transaction
     resp_json = resp.json()
     assert len(resp_json["features"]) == 0
 
+    params["query"] = quote_plus(orjson.dumps(params["query"]))
+    resp = app_client.get("/search", params=params)
+    assert resp.status_code == 200
+    resp_json = resp.json()
+    assert len(resp_json["features"]) == 0
+
 
 def test_app_query_extension_gte(load_test_data, app_client, postgres_transactions):
     test_item = load_test_data("test_item.json")