diff --git a/.gitignore b/.gitignore
index f805e81..2c78755 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 *.ko
 *.obj
 *.elf
+*.bc
 
 # Precompiled Headers
 *.gch
diff --git a/Changes b/Changes
index 8d063dc..989d99b 100644
--- a/Changes
+++ b/Changes
@@ -3,6 +3,7 @@ Changelog for pgzint
 0.1.4   2019-05-09
       - [3] Buffer overflow on foreground and background colors
       - Make scale a float8 (double) instead of integer, to align with Zint's API
+      - Add support for ALTER EXTENSION
 
 0.1.3   2018-08-05
       - [sigh] fix pgxn release
diff --git a/Makefile b/Makefile
index f970a3c..5a88f69 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
-MODULE_big   = pgzint
+MODULE_big   = pgzint-0.1.4
 OBJS         = pgzint.o
 SHLIB_LINK   = -lzint -lpng
 EXTENSION    = pgzint
-DATA         = pgzint--0.1.4.sql
+DATA         = $(wildcard pgzint--*.sql)
 DOCS         = README.md
 TESTS        = $(wildcard test/sql/*.sql)
 REGRESS      = $(patsubst test/sql/%.sql,%,$(TESTS))
diff --git a/README.md b/README.md
index 5bc2c98..04b33c6 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
-# pgzint 0.1.4
-=================
+pgzint 0.1.4
+============
 
 PostgreSQL extension for the Zint Barcode library
 
@@ -25,7 +25,7 @@ It primarily adds a function, from pgzint.c:
         poption2 integer,
         poption3 integer,
         protation integer = 0
-        )
+    )
 
 To determine information about what barcode symbologies are available, a table called `bc_symbols` and a view called `barcodes` have been added. Two functions, `getzintsymbolconstant(integer)` and `getzintsymbolid(text)` can be used to look make passing parameters to the barcode generation function easier.
 
@@ -61,6 +61,11 @@ To build it, just do this:
     make installcheck
     make install
 
+If you are updating from a version prior to 0.1.4, after you make/make install
+issue the following to each database that has pgzint installed:
+
+    `ALTER EXTENSION pgzint UPDATE TO '0.1.4';`
+
 If you encounter an error such as:
 
     make: pg_config: Command not found