diff --git a/README.md b/README.md
index b05480b0..4de297ce 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ Say thanks!
 <td>VK<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/vk.svg" width="125" title="VK" /><br>534 Bytes</td>
 <td>Mastodon<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/mastodon.svg" width="125" title="Mastodon" /><br>550 Bytes</td>
 <td>imgur<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/imgur.svg" width="125" title="imgur" /><br>356 Bytes</td>
-<td>Slack<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/slack.svg" width="125" title="Slack" /><br>488 Bytes</td>
+<td>Slack<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/slack.svg" width="125" title="Slack" /><br>472 Bytes</td>
 </tr>
 </table>
 
@@ -147,6 +147,7 @@ Say thanks!
 <td>Upwork<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/upwork.svg" width="125" title="Upwork" /><br>670 Bytes</td>
 <td>Duck Duck Go<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/duckduckgo.svg" width="125" title="Duck Duck Go" /><br>1023 Bytes</td>
 <td>Bing<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/bing.svg" width="125" title="Bing" /><br>241 Bytes</td>
+<td>IMDb<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/imdb.svg" width="125" title="IMDb" /><br>526 Bytes</td>
 </tr>
 </table>
 
@@ -228,7 +229,7 @@ Say thanks!
 <table>
 <tr>
 <td>Python<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/python.svg" width="125" title="Python" /><br>510 Bytes</td>
-<td>PHP<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/php.svg" width="125" title="PHP" /><br>842 Bytes</td>
+<td>PHP<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/php.svg" width="125" title="PHP" /><br>546 Bytes</td>
 <td>Laravel<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/laravel.svg" width="125" title="Laravel" /><br>583 Bytes</td>
 <td>Drupal<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/drupal.svg" width="125" title="Drupal" /><br>1002 Bytes</td>
 <td>React<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/react.svg" width="125" title="React" /><br>361 Bytes</td>
diff --git a/images/reference/imdb.svg b/images/reference/imdb.svg
new file mode 100644
index 00000000..a2e9c857
--- /dev/null
+++ b/images/reference/imdb.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="64px" height="32px" viewBox="0 0 64 32" version="1.1">
+    <g fill="#F5C518">
+        <rect x="0" y="0" width="64" height="32" rx="4"/>
+    </g>
+    <g transform="translate(8.000000, 7.000000)" fill="#000000" fill-rule="nonzero">
+        <polygon points="0 18 5 18 5 0 0 0"/>
+        <path d="M15.6725178,0 L14.5534833,8.40846934 L13.8582008,3.83502426 C13.65661,2.37009263 13.4632474,1.09175121 13.278113,0 L7,0 L7,18 L11.2416347,18 L11.2580911,6.11380679 L13.0436094,18 L16.0633571,18 L17.7583653,5.8517865 L17.7707076,18 L22,18 L22,0 L15.6725178,0 Z"/>
+        <path d="M24,18 L24,0 L31.8045586,0 C33.5693522,0 35,1.41994415 35,3.17660424 L35,14.8233958 C35,16.5777858 33.5716617,18 31.8045586,18 L24,18 Z M29.8322479,3.2395236 C29.6339219,3.13233348 29.2545158,3.08072342 28.7026524,3.08072342 L28.7026524,14.8914865 C29.4312846,14.8914865 29.8796736,14.7604764 30.0478195,14.4865461 C30.2159654,14.2165858 30.3021941,13.486105 30.3021941,12.2871637 L30.3021941,5.3078959 C30.3021941,4.49404499 30.272014,3.97397442 30.2159654,3.74371416 C30.1599168,3.5134539 30.0348852,3.34671372 29.8322479,3.2395236 Z"/>
+        <path d="M44.4299079,4.50685823 L44.749518,4.50685823 C46.5447098,4.50685823 48,5.91267586 48,7.64486762 L48,14.8619906 C48,16.5950653 46.5451816,18 44.749518,18 L44.4299079,18 C43.3314617,18 42.3602746,17.4736618 41.7718697,16.6682739 L41.4838962,17.7687785 L37,17.7687785 L37,0 L41.7843263,0 L41.7843263,5.78053556 C42.4024982,5.01015739 43.3551514,4.50685823 44.4299079,4.50685823 Z M43.4055679,13.2842155 L43.4055679,9.01907814 C43.4055679,8.31433946 43.3603268,7.85185468 43.2660746,7.63896485 C43.1718224,7.42607505 42.7955881,7.2893916 42.5316822,7.2893916 C42.267776,7.2893916 41.8607934,7.40047379 41.7816216,7.58767002 L41.7816216,9.01907814 L41.7816216,13.4207851 L41.7816216,14.8074788 C41.8721037,15.0130276 42.2602358,15.1274059 42.5316822,15.1274059 C42.8031285,15.1274059 43.1982131,15.0166981 43.281155,14.8074788 C43.3640968,14.5982595 43.4055679,14.0880581 43.4055679,13.2842155 Z"/>
+    </g>
+</svg>
\ No newline at end of file
diff --git a/images/reference/index.md b/images/reference/index.md
index 82ba1f9b..f69875e7 100644
--- a/images/reference/index.md
+++ b/images/reference/index.md
@@ -132,7 +132,8 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/react.svg" width="256" /> | <img src="/images/reference/react.svg" width="256" />  | https://github.com/facebook/react/blob/master/fixtures/dom/public/react-logo.svg |
 | <img src="/images/svg/vue.svg" width="256" /> | <img src="/images/reference/vue.svg" width="256" />  | https://github.com/vuejs/art/blob/master/logo.svg |
 | <img src="/images/svg/angular.svg" width="256" /> | <img src="/images/reference/angular.svg" width="256" />  | https://angular.io/presskit |
-| <img src="/images/svg/sass.svg" width="256" /> | <img src="/images/reference/seal-color-aef0354c.svg" width="256" />  | https://sass-lang.com/styleguide/brand |
+| <img src="/images/svg/sass.svg" width="256" /> | <img src="/images/reference/seal-color-aef0354c.png" width="256" />  | https://sass-lang.com/styleguide/brand |
 | <img src="/images/svg/duckduckgo.svg" width="256" /> | <img src="/images/reference/DuckDuckGoLogo-Dax-Solo.svg" width="256" />  | https://duckduckgo.com/press |
 | <img src="/images/svg/bing.svg" width="256" /> | <img src="/images/reference/BingLogo.png" width="256" />  | https://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RE1q9FS |
 | <img src="/images/svg/json.svg" width="256" /> | <img src="/images/reference/json.gif" width="256" />  | https://json.org/ |
+| <img src="/images/svg/imdb.svg" width="256" /> | <img src="/images/reference/imdb.svg" width="256" />  | https://imdb.com/ |
diff --git a/images/svg/imdb.svg b/images/svg/imdb.svg
new file mode 100644
index 00000000..9602b189
--- /dev/null
+++ b/images/svg/imdb.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+aria-label="IMDb" role="img"
+viewBox="0 0 512 512"><rect
+width="512" height="512"
+rx="15%"
+fill="#f5c518"/><path d="M104 328V184H64v144zM189 184l-9 67-5-36-5-31h-50v144h34v-95l14 95h25l13-97v97h34V184zM256 328V184h62c15 0 26 11 26 25v94c0 14-11 25-26 25zm47-118l-9-1v94c5 0 9-1 10-3 2-2 2-8 2-18v-56-12l-3-4zM419 220h3c14 0 26 11 26 25v58c0 14-12 25-26 25h-3c-8 0-16-4-21-11l-2 9h-36V184h38v46c5-6 13-10 21-10zm-8 70v-34l-1-11c-1-2-4-3-6-3s-5 1-6 3v57c1 2 4 3 6 3s6-1 6-3l1-12z"/></svg>
\ No newline at end of file
diff --git a/images/svg/php.svg b/images/svg/php.svg
index d2f45996..9524b670 100644
--- a/images/svg/php.svg
+++ b/images/svg/php.svg
@@ -3,4 +3,4 @@ aria-label="PHP" role="img"
 viewBox="0 0 512 512"><rect
 width="512" height="512"
 rx="15%"
-fill="#777bb3"/><g style="stroke:#fff;stroke-width:6;"><path d="M131 283c11 0 20-2 25-7 6-4 10-11 12-21 1-10 1-16-3-20-3-3-10-5-21-5h-18l-11 53zm-61 65a3 3 0 0 1-3-3l27-141 3-2h59c18 0 32 5 41 15s11 24 8 41a66 66 0 0 1-20 36c-7 6-14 10-22 13-7 2-17 4-29 4h-24l-7 35c0 1-1 2-3 2z"/><path d="M275 311a3 3 0 0 1-3-4l12-62c1-6 1-10-1-12-1-1-4-3-13-3h-22l-15 78c0 2-1 3-3 3h-30a3 3 0 0 1-3-4l28-140c0-2 1-2 2-2h31a3 3 0 0 1 3 3l-7 34h24c17 0 30 3 37 10 7 6 9 17 6 31l-12 65-3 3z"/><path d="M369 283c12 0 21-2 26-7 6-4 9-11 11-21s2-16-2-20c-3-3-10-5-21-5h-18l-11 53zm-60 65a3 3 0 0 1-3-3l27-141 3-2h59c18 0 32 5 41 15 8 10 11 24 8 41a66 66 0 0 1-20 36c-7 6-14 10-22 13-8 2-17 4-29 4h-24l-7 35c0 1-1 2-3 2z"/></g></svg>
\ No newline at end of file
+fill="#777bb3"/><g stroke="#fff" stroke-width="6"><path id="a" d="M155 202H97a3 3 0 0 0-3 2L67 345c0 3 3 3 3 3h30c3 0 3-2 3-2l7-35h27c42 0 63-28 68-53s1-56-50-56zm13 54c-4 19-17 27-35 27h-18l11-53h18c27 0 26 10 24 26z"/><path d="M275 311c-4 0-3-4-3-4l12-61c0-8 6-16-18-15h-18l-15 78s0 3-4 3h-29c-3 0-3-3-3-3l28-141s0-2 4-2h30c3 0 2 3 2 3l-7 34h26c36 0 45 17 42 37l-13 69s0 3-5 3z"/><use href="#a" x="239"/></g></svg>
diff --git a/images/svg/slack.svg b/images/svg/slack.svg
index e12d8454..42989c89 100644
--- a/images/svg/slack.svg
+++ b/images/svg/slack.svg
@@ -1,11 +1,6 @@
 <svg xmlns="http://www.w3.org/2000/svg"
 aria-label="Slack" role="img"
-viewBox="0 0 512 512">
-<rect
+viewBox="0 0 512 512"><rect
 width="512" height="512"
 rx="15%"
-fill="#fff"/>
-<g fill="#e01e5a"><path id="a" d="M149 305a39 39 0 0 1-78 0c0-22 17-39 39-39h39zM168 305a39 39 0 0 1 78 0v97a39 39 0 0 1-78 0z"/></g>
-<use href="#a" fill="#36c5f0" transform="rotate(90,256,256)"/> 
-<use href="#a" fill="#2eb67d" transform="rotate(180,256,256)"/>
-<use href="#a" fill="#ecb22e" transform="rotate(270,256,256)"/></svg>
\ No newline at end of file
+fill="#fff"/><g fill="#e01e5a"><path id="a" d="M149 305a39 39 0 0 1-78 0c0-22 17-39 39-39h39zM168 305a39 39 0 0 1 78 0v97a39 39 0 0 1-78 0z"/></g><use href="#a" fill="#36c5f0" transform="rotate(90,256,256)"/><use href="#a" fill="#2eb67d" transform="rotate(180,256,256)"/><use href="#a" fill="#ecb22e" transform="rotate(270,256,256)"/></svg>
\ No newline at end of file