diff --git a/docs/ref/contrib/gis/install/geolibs.txt b/docs/ref/contrib/gis/install/geolibs.txt
index 2e48bcf74f..ad8aff846e 100644
--- a/docs/ref/contrib/gis/install/geolibs.txt
+++ b/docs/ref/contrib/gis/install/geolibs.txt
@@ -9,7 +9,7 @@ geospatial libraries:
 Program                   Description                           Required                          Supported Versions
 ========================  ====================================  ================================  ================================================
 :doc:`GEOS <../geos>`     Geometry Engine Open Source           Yes                               3.11, 3.10, 3.9, 3.8, 3.7, 3.6
-`PROJ`_                   Cartographic Projections library      Yes (PostgreSQL and SQLite only)  9.x, 8.x, 7.x, 6.x, 5.x, 4.x
+`PROJ`_                   Cartographic Projections library      Yes (PostgreSQL and SQLite only)  9.x, 8.x, 7.x, 6.x, 5.x
 :doc:`GDAL <../gdal>`     Geospatial Data Abstraction Library   Yes                               3.6, 3.5, 3.4, 3.3, 3.2, 3.1, 3.0, 2.4, 2.3, 2.2
 :doc:`GeoIP <../geoip2>`  IP-based geolocation library          No                                2
 `PostGIS`__               Spatial extensions for PostgreSQL     Yes (PostgreSQL only)             3.3, 3.2, 3.1, 3.0, 2.5
@@ -48,7 +48,6 @@ totally fine with GeoDjango. Your mileage may vary.
     PROJ 7.0.0 2020-02-25
     PROJ 6.0.0 2019-02-26
     PROJ 5.0.0 2018-03-01
-    PROJ 4.9.0 2014-09-14
     SpatiaLite 4.3.0 2015-09-07
     SpatiaLite 5.0.0 2020-08-23
 
diff --git a/docs/releases/4.2.txt b/docs/releases/4.2.txt
index c3b939bf8b..91684301a5 100644
--- a/docs/releases/4.2.txt
+++ b/docs/releases/4.2.txt
@@ -549,6 +549,8 @@ Miscellaneous
   object for ``wsgi.input``. Previously, Django was more lax than the expected
   behavior as specified by the WSGI specification.
 
+* Support for ``PROJ`` < 5 is removed.
+
 .. _deprecated-features-4.2:
 
 Features deprecated in 4.2
diff --git a/tests/gis_tests/gdal_tests/test_srs.py b/tests/gis_tests/gdal_tests/test_srs.py
index 8a2973cf00..fd25dcbc34 100644
--- a/tests/gis_tests/gdal_tests/test_srs.py
+++ b/tests/gis_tests/gdal_tests/test_srs.py
@@ -19,8 +19,6 @@ class TestSRS:
             setattr(self, key, value)
 
 
-WGS84_proj = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs "
-
 # Some Spatial Reference examples
 srlist = (
     TestSRS(
@@ -245,7 +243,7 @@ class SpatialRefTest(SimpleTestCase):
             "+no_defs",
         ]
         srs1 = SpatialReference(srlist[0].wkt)
-        srs2 = SpatialReference(WGS84_proj)
+        srs2 = SpatialReference("+proj=longlat +datum=WGS84 +no_defs")
         self.assertTrue(all(part in proj_parts for part in srs1.proj.split()))
         self.assertTrue(all(part in proj_parts for part in srs2.proj.split()))
 
diff --git a/tests/gis_tests/geos_tests/test_geos.py b/tests/gis_tests/geos_tests/test_geos.py
index f510b925ff..9b6068009d 100644
--- a/tests/gis_tests/geos_tests/test_geos.py
+++ b/tests/gis_tests/geos_tests/test_geos.py
@@ -892,8 +892,8 @@ class GEOSTest(SimpleTestCase, TestDataMixin):
             # Test conversion from custom to a known srid
             c2w = gdal.CoordTransform(
                 gdal.SpatialReference(
-                    "+proj=mill +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R_A +ellps=WGS84 "
-                    "+datum=WGS84 +units=m +no_defs"
+                    "+proj=mill +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +R_A +datum=WGS84 "
+                    "+units=m +no_defs"
                 ),
                 gdal.SpatialReference(4326),
             )
diff --git a/tests/gis_tests/test_spatialrefsys.py b/tests/gis_tests/test_spatialrefsys.py
index 7151e8d3d6..512fd217c3 100644
--- a/tests/gis_tests/test_spatialrefsys.py
+++ b/tests/gis_tests/test_spatialrefsys.py
@@ -11,10 +11,8 @@ test_srs = (
         "auth_srid": 4326,
         # Only the beginning, because there are differences depending on installed libs
         "srtext": 'GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84"',
-        # +ellps=WGS84 has been removed in the 4326 proj string in proj-4.8
         "proj_re": (
-            r"\+proj=longlat (\+ellps=WGS84 )?(\+datum=WGS84 |\+towgs84=0,0,0,0,0,0,0 )"
-            r"\+no_defs ?"
+            r"\+proj=longlat (\+datum=WGS84 |\+towgs84=0,0,0,0,0,0,0 )\+no_defs ?"
         ),
         "spheroid": "WGS 84",
         "name": "WGS 84",