diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 27e9a042..86463b69 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -145,6 +145,7 @@
 
 - Jostein Bø Fløystad
   Tomography: radon/iradon improvements and SART implementation
+  Phase unwrapping integration
 
 - Matt Terry
   Color difference functions
@@ -160,3 +161,15 @@
 
 - Michael Hansen
   novice submodule
+
+- Munther Gdeisat
+  Phase unwrapping implementation
+
+- Miguel Arevallilo Herraez
+  Phase unwrapping implementation
+
+- Hussein Abdul-Rahman
+  Phase unwrapping implementation
+
+- Gregor Thalhammer
+  Phase unwrapping integration