diff --git a/lib/geo_postgis/extension.ex b/lib/geo_postgis/extension.ex
index 8a5826d..bc9c2d5 100644
--- a/lib/geo_postgis/extension.ex
+++ b/lib/geo_postgis/extension.ex
@@ -44,6 +44,7 @@ defmodule Geo.PostGIS.Extension do
     Geo.GeometryCollection,
     Geo.LineString,
     Geo.LineStringZ,
+    Geo.LineStringZM,
     Geo.MultiLineString,
     Geo.MultiLineStringZ,
     Geo.MultiPoint,
diff --git a/lib/geo_postgis/geometry.ex b/lib/geo_postgis/geometry.ex
index a35197c..a762b98 100644
--- a/lib/geo_postgis/geometry.ex
+++ b/lib/geo_postgis/geometry.ex
@@ -11,6 +11,7 @@ if Code.ensure_loaded?(Ecto.Type) do
       PointZM,
       LineString,
       LineStringZ,
+      LineStringZM,
       Polygon,
       PolygonZ,
       MultiPoint,
@@ -29,6 +30,7 @@ if Code.ensure_loaded?(Ecto.Type) do
       "PointZM",
       "LineString",
       "LineStringZ",
+      "LineStringZM",
       "Polygon",
       "PolygonZ",
       "MultiPoint",
@@ -46,6 +48,7 @@ if Code.ensure_loaded?(Ecto.Type) do
       PointZM,
       LineString,
       LineStringZ,
+      LineStringZM,
       Polygon,
       PolygonZ,
       MultiPoint,
diff --git a/test/geo_postgis_test.exs b/test/geo_postgis_test.exs
index 70faa76..93628fb 100644
--- a/test/geo_postgis_test.exs
+++ b/test/geo_postgis_test.exs
@@ -7,7 +7,7 @@ defmodule Geo.PostGIS.Test do
     {:ok, _result} =
       Postgrex.query(
         pid,
-        "DROP TABLE IF EXISTS text_test, point_test, linestring_test, polygon_test, multipoint_test, multilinestring_test, multipolygon_test, geometrycollection_test",
+        "DROP TABLE IF EXISTS text_test, point_test, linestring_test, linestringz_test, linestringzm_test, polygon_test, multipoint_test, multilinestring_test, multipolygon_test, geometrycollection_test",
         []
       )
 
@@ -76,6 +76,42 @@ defmodule Geo.PostGIS.Test do
     assert(result.rows == [[42, geo]])
   end
 
+  test "insert LineStringZ", context do
+    pid = context[:pid]
+    geo = %Geo.LineStringZ{srid: 4326, coordinates: [{30, 10, 20}, {10, 30, 2}, {40, 40, 50}]}
+
+    {:ok, _} =
+      Postgrex.query(
+        pid,
+        "CREATE TABLE linestringz_test (id int, geom geometry(LineStringZ, 4326))",
+        []
+      )
+
+    {:ok, _} = Postgrex.query(pid, "INSERT INTO linestringz_test VALUES ($1, $2)", [42, geo])
+    {:ok, result} = Postgrex.query(pid, "SELECT * FROM linestringz_test", [])
+    assert result.rows == [[42, geo]]
+  end
+
+  test "insert LineStringZM", context do
+    pid = context[:pid]
+
+    geo = %Geo.LineStringZM{
+      srid: 4326,
+      coordinates: [{30, 10, 20, 40}, {10, 30, 2, -10}, {40, 40, 50, 100}]
+    }
+
+    {:ok, _} =
+      Postgrex.query(
+        pid,
+        "CREATE TABLE linestringzm_test (id int, geom geometry(LineStringZM, 4326))",
+        []
+      )
+
+    {:ok, _} = Postgrex.query(pid, "INSERT INTO linestringzm_test VALUES ($1, $2)", [42, geo])
+    {:ok, result} = Postgrex.query(pid, "SELECT * FROM linestringzm_test", [])
+    assert result.rows == [[42, geo]]
+  end
+
   test "insert polygon", context do
     pid = context[:pid]