diff --git a/docs/intro/intro.rst b/docs/intro/intro.rst
index 080d32f..81df3c7 100644
--- a/docs/intro/intro.rst
+++ b/docs/intro/intro.rst
@@ -292,7 +292,7 @@ The ``PinJoint`` methode takes 2 bodies and their local positions as argument.
 We place the static body ``b0``'s anchor at (200, 200) and leave the dynamic ``body`` at its default anchor 
 of (0, 0). This creates a pin between static point (200, 200) and dynamic point (100, 100)::
 
-    joint = pymunk.constraint.PinJoint(b0, body, (200, 200))
+    joint = pymunk.constraints.PinJoint(b0, body, (200, 200))
 
 Due to gravity, the pendulum starts swinging.
 
@@ -318,4 +318,4 @@ using a series of swinging spheres.
 
 .. image:: intro9.png
 
-:download:`intro9.py<intro9.py>`
\ No newline at end of file
+:download:`intro9.py<intro9.py>`
diff --git a/docs/intro/intro7.py b/docs/intro/intro7.py
index 3d2fa0c..abe43d9 100644
--- a/docs/intro/intro7.py
+++ b/docs/intro/intro7.py
@@ -6,7 +6,7 @@
 body.position = (100, 100)
 circle = pymunk.Circle(body, radius=20)
 
-joint = pymunk.constraint.PinJoint(b0, body, (200, 200))
+joint = pymunk.constraints.PinJoint(b0, body, (200, 200))
 space.add(body, circle, joint)
 
-App().run()
\ No newline at end of file
+App().run()
diff --git a/docs/intro/intro8.py b/docs/intro/intro8.py
index 5ad9538..af47f8f 100644
--- a/docs/intro/intro8.py
+++ b/docs/intro/intro8.py
@@ -14,8 +14,8 @@
 c2.elasticity = 0.999
 space.add(b2, c2)
 
-j1 = pymunk.constraint.PinJoint(b0, b1, (200, 200))
-j2 = pymunk.constraint.PinJoint(b0, b2, (240, 200))
+j1 = pymunk.constraints.PinJoint(b0, b1, (200, 200))
+j2 = pymunk.constraints.PinJoint(b0, b2, (240, 200))
 space.add(j1, j2)
 
-App().run()
\ No newline at end of file
+App().run()
diff --git a/docs/intro/intro9.py b/docs/intro/intro9.py
index 9210fe5..1d558dc 100644
--- a/docs/intro/intro9.py
+++ b/docs/intro/intro9.py
@@ -9,7 +9,7 @@
         body.position = 50, 200
     shape = pymunk.Circle(body, radius=20)
     shape.elasticity = 0.999
-    joint = pymunk.constraint.PinJoint(b0, body, (200+i*40, 200))
+    joint = pymunk.constraints.PinJoint(b0, body, (200+i*40, 200))
     space.add(body, shape, joint)
 
-App().run()
\ No newline at end of file
+App().run()