diff -Nru opencascade-7.3.0/debian/changelog opencascade-7.3.0/debian/changelog
--- opencascade-7.3.0/debian/changelog	2018-07-10 05:30:59.000000000 +0000
+++ opencascade-7.3.0/debian/changelog	2018-07-11 09:57:34.000000000 +0000
@@ -1,13 +1,14 @@
-opencascade (7.3.0-0ppa3~ubuntu16.04.1) xenial; urgency=low
+opencascade (7.3.0-0ppa4~ubuntu16.04.1) xenial; urgency=low
 
   * Auto build.
 
- -- Kurt Kremitzki <kkremitzki@gmail.com>  Tue, 10 Jul 2018 05:30:59 +0000
+ -- Kurt Kremitzki <kkremitzki@gmail.com>  Wed, 11 Jul 2018 09:57:34 +0000
 
-opencascade (7.3.0+dfsg1-0ppa3) bionic; urgency=medium
+opencascade (7.3.0+dfsg1-0ppa4) bionic; urgency=medium
 
   * Fix compat level
   * Don't track symbols
+  * Add Conflicts, Replaces to assist 7.2->7.3 upgrade path
 
  -- Kurt Kremitzki <kkremitzki@gmail.com>  Mon, 09 Jul 2018 15:03:35 -0500
 
diff -Nru opencascade-7.3.0/debian/control opencascade-7.3.0/debian/control
--- opencascade-7.3.0/debian/control	2018-07-10 05:30:59.000000000 +0000
+++ opencascade-7.3.0/debian/control	2018-07-11 09:57:34.000000000 +0000
@@ -31,6 +31,8 @@
 Section: libs
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Pre-Depends: ${misc:Pre-Depends}
+Conflicts: libocct-foundation-7.2
+Replaces: libocct-foundation-7.2
 Description: OCCT module underlying all other OCCT classes
  Open CASCADE Technology is a suite for 3D surface and solid modeling,
  visualization, data exchange and rapid application development.  It is an
@@ -69,6 +71,8 @@
 Section: libs
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Pre-Depends: ${misc:Pre-Depends}
+Conflicts: libocct-modeling-data-7.2
+Replaces: libocct-modeling-data-7.2
 Description: Open CASCADE Technology 2D/3D geometric primitives data structures
  Open CASCADE Technology is a suite for 3D surface and solid modeling,
  visualization, data exchange and rapid application development.  It is an
@@ -106,6 +110,8 @@
 Section: libs
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Pre-Depends: ${misc:Pre-Depends}
+Conflicts: libocct-modeling-algorithms-7.2
+Replaces: libocct-modeling-algorithms-7.2
 Description: Open CASCADE Technology geometrical & topological algorithms module
  Open CASCADE Technology is a suite for 3D surface and solid modeling,
  visualization, data exchange and rapid application development.  It is an
@@ -142,6 +148,8 @@
 Section: libs
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Pre-Depends: ${misc:Pre-Depends}
+Conflicts: libocct-visualization-7.2
+Replaces: libocct-visualization-7.2
 Description: Open CASCADE Technology graphical data visualization module
  Open CASCADE Technology is a suite for 3D surface and solid modeling,
  visualization, data exchange and rapid application development.  It is an
@@ -192,6 +200,8 @@
 Section: libs
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Pre-Depends: ${misc:Pre-Depends}
+Conflicts: libocct-ocaf-7.2
+Replaces: libocct-ocaf-7.2
 Description: Open CASCADE Technology application-specific data and functionality
  Open CASCADE Technology is a suite for 3D surface and solid modeling,
  visualization, data exchange and rapid application development.  It is an
@@ -237,6 +247,8 @@
 Section: libs
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Pre-Depends: ${misc:Pre-Depends}
+Conflicts: libocct-data-exchange-7.2
+Replaces: libocct-data-exchange-7.2
 Description: Open CASCADE Technology module for CAD data format interoperability
  Open CASCADE Technology is a suite for 3D surface and solid modeling,
  visualization, data exchange and rapid application development.  It is an
@@ -288,6 +300,8 @@
          ${misc:Depends},
          ${shlibs:Depends}
 Pre-Depends: ${misc:Pre-Depends}
+Conflicts: libocct-draw-7.2
+Replaces: libocct-draw-7.2
 Description: Open CASCADE Technology command interpreter & graphical test library
  Open CASCADE Technology is a suite for 3D surface and solid modeling,
  visualization, data exchange and rapid application development.  It is an
diff -Nru opencascade-7.3.0/debian/git-build-recipe.manifest opencascade-7.3.0/debian/git-build-recipe.manifest
--- opencascade-7.3.0/debian/git-build-recipe.manifest	2018-07-10 05:30:59.000000000 +0000
+++ opencascade-7.3.0/debian/git-build-recipe.manifest	2018-07-11 09:57:34.000000000 +0000
@@ -1,3 +1,3 @@
-# git-build-recipe format 0.4 deb-version 7.3.0-0ppa3
+# git-build-recipe format 0.4 deb-version 7.3.0-0ppa4
 lp:~freecad-maintainers/+git/OCCT-7.2.0 git-commit:62b4061e73e9625d38358c5a5b5e54e32021c6cb
-merge OCCT7-packaging lp:~freecad-maintainers/+git/OCCT7-packaging git-commit:cbd747e394359965726f0c115e4e585e7fa47c71
+merge OCCT7-packaging lp:~freecad-maintainers/+git/OCCT7-packaging git-commit:912cb60e48c5bde318e9194a526e723c1c3f1071
diff -Nru opencascade-7.3.0/.pc/.quilt_patches opencascade-7.3.0/.pc/.quilt_patches
--- opencascade-7.3.0/.pc/.quilt_patches	2018-07-10 05:31:00.000000000 +0000
+++ opencascade-7.3.0/.pc/.quilt_patches	2018-07-11 09:57:34.000000000 +0000
@@ -1 +1 @@
-/home/buildd/build-RECIPEBRANCHBUILD-1606632/chroot-autobuild/home/buildd/work/tree/recipe/debian/patches
+/home/buildd/build-RECIPEBRANCHBUILD-1607213/chroot-autobuild/home/buildd/work/tree/recipe/debian/patches
diff -Nru opencascade-7.3.0/.pc/.quilt_series opencascade-7.3.0/.pc/.quilt_series
--- opencascade-7.3.0/.pc/.quilt_series	2018-07-10 05:31:00.000000000 +0000
+++ opencascade-7.3.0/.pc/.quilt_series	2018-07-11 09:57:34.000000000 +0000
@@ -1 +1 @@
-/home/buildd/build-RECIPEBRANCHBUILD-1606632/chroot-autobuild/home/buildd/work/tree/recipe/debian/patches/series
+/home/buildd/build-RECIPEBRANCHBUILD-1607213/chroot-autobuild/home/buildd/work/tree/recipe/debian/patches/series