diff --git a/README.md b/README.md
index 6056e39c..0a11d9b2 100755
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ This module is powered by the blazingly fast [libvips](https://github.com/jcupit
 ### Prerequisites
 
 * Node.js v0.10+
-* [libvips](https://github.com/jcupitt/libvips) v7.38.5+ (7.40.12+ recommended)
+* [libvips](https://github.com/jcupitt/libvips) v7.40.0+ (7.42.0+ recommended)
 
 To install the most suitable version of libvips on the following Operating Systems:
 
@@ -214,12 +214,12 @@ sharp(inputBuffer)
 
 Constructor to which further methods are chained. `input`, if present, can be one of:
 
-* Buffer containing JPEG, PNG, WebP or TIFF (libvips 7.40.0+) image data, or
+* Buffer containing JPEG, PNG, WebP or TIFF image data, or
 * String containing the filename of an image, with most major formats supported.
 
 The object returned implements the [stream.Duplex](http://nodejs.org/api/stream.html#stream_class_stream_duplex) class.
 
-JPEG, PNG, WebP or TIFF (libvips 7.40.0+) format image data can be streamed into the object when `input` is not provided.
+JPEG, PNG, WebP or TIFF format image data can be streamed into the object when `input` is not provided.
 
 JPEG, PNG or WebP format image data can be streamed out from this object.
 
@@ -232,7 +232,7 @@ Fast access to image metadata without decoding any compressed image data.
 * `format`: Name of decoder to be used to decompress image data e.g. `jpeg`, `png`, `webp` (for file-based input additionally `tiff` and `magick`)
 * `width`: Number of pixels wide
 * `height`: Number of pixels high
-* `space`: Name of colour space interpretation e.g. `srgb`, `rgb`, `scrgb`, `cmyk`, `lab`, `xyz`, `b-w` [...](https://github.com/jcupitt/libvips/blob/master/libvips/iofuncs/enumtypes.c#L502)
+* `space`: Name of colour space interpretation e.g. `srgb`, `rgb`, `scrgb`, `cmyk`, `lab`, `xyz`, `b-w` [...](https://github.com/jcupitt/libvips/blob/master/libvips/iofuncs/enumtypes.c#L522)
 * `channels`: Number of bands e.g. `3` for sRGB, `4` for CMYK
 * `hasAlpha`: Boolean indicating the presence of an alpha transparency channel
 * `orientation`: Number value of the EXIF Orientation header, if present
diff --git a/index.js b/index.js
index 29a9efbf..9f40367f 100755
--- a/index.js
+++ b/index.js
@@ -71,11 +71,9 @@ var Sharp = function(input) {
       (input[0] === 0x89 && input[1] === 0x50) ||
       // WebP
       (input[0] === 0x52 && input[1] === 0x49) ||
-      // TIFF - requires libvips 7.40.0+
-      (semver.gte(libvipsVersion, '7.40.0') && (
-        (input[0] === 0x4D && input[1] === 0x4D && input[2] === 0x00 && (input[3] === 0x2A || input[3] === 0x2B)) ||
-        (input[0] === 0x49 && input[1] === 0x49 && (input[2] === 0x2A || input[2] === 0x2B) && input[3] === 0x00)
-      ))
+      // TIFF
+      (input[0] === 0x4D && input[1] === 0x4D && input[2] === 0x00 && (input[3] === 0x2A || input[3] === 0x2B)) ||
+      (input[0] === 0x49 && input[1] === 0x49 && (input[2] === 0x2A || input[2] === 0x2B) && input[3] === 0x00)
     ) {
       this.options.bufferIn = input;
     } else {
diff --git a/package.json b/package.json
index 37e90936..cb57accc 100755
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "Brandon Aaron <hello.brandon@aaron.sh>",
     "Andreas Lind <andreas@one.com>"
   ],
-  "description": "High performance Node.js module to resize JPEG, PNG and WebP images using the libvips library",
+  "description": "High performance Node.js module to resize JPEG, PNG, WebP and TIFF images using the libvips library",
   "scripts": {
     "test": "node ./node_modules/istanbul/lib/cli.js cover ./node_modules/mocha/bin/_mocha -- --slow=5000 --timeout=10000 ./test/unit/*.js"
   },
@@ -36,8 +36,6 @@
     "embed",
     "libvips",
     "vips",
-    "fast",
-    "buffer",
     "stream"
   ],
   "dependencies": {
diff --git a/preinstall.sh b/preinstall.sh
index 24f2fcf5..e051694d 100755
--- a/preinstall.sh
+++ b/preinstall.sh
@@ -5,13 +5,13 @@
 # * Mac OS
 # * Debian Linux
 #   * Debian 7, 8
-#   * Ubuntu 12.04, 14.04, 14.10
+#   * Ubuntu 12.04, 14.04, 14.10, 15.04
 #   * Mint 13, 17
 # * Red Hat Linux
 #   * RHEL/Centos/Scientific 6, 7
 #   * Fedora 21, 22
 
-vips_version_minimum=7.38.5
+vips_version_minimum=7.40.0
 vips_version_latest_major=7.40
 vips_version_latest_minor=11
 
diff --git a/src/common.cc b/src/common.cc
index 79d10eea..9090718d 100755
--- a/src/common.cc
+++ b/src/common.cc
@@ -34,7 +34,6 @@ namespace sharp {
   unsigned char const MARKER_PNG[] = {0x89, 0x50};
   unsigned char const MARKER_WEBP[] = {0x52, 0x49};
 
-#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 40)
   static bool buffer_is_tiff(char *buffer, size_t len) {
     return (
       len >= 4 && (
@@ -43,7 +42,6 @@ namespace sharp {
       )
     );
   }
-#endif
 
   /*
     Determine image format of a buffer.
@@ -57,10 +55,8 @@ namespace sharp {
         imageType = ImageType::PNG;
       } else if (memcmp(MARKER_WEBP, buffer, 2) == 0) {
         imageType = ImageType::WEBP;
-#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 40)
       } else if (buffer_is_tiff(static_cast<char*>(buffer), length)) {
         imageType = ImageType::TIFF;
-#endif
       }
     }
     return imageType;
@@ -77,10 +73,8 @@ namespace sharp {
       vips_pngload_buffer(buffer, length, &image, "access", access, NULL);
     } else if (imageType == ImageType::WEBP) {
       vips_webpload_buffer(buffer, length, &image, "access", access, NULL);
-#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 40)
     } else if (imageType == ImageType::TIFF) {
       vips_tiffload_buffer(buffer, length, &image, "access", access, NULL);
-#endif
     }
     return image;
   }