diff --git a/static/styles/night_mode.css b/static/styles/night_mode.css
index 8e4522f953..165957f1fa 100644
--- a/static/styles/night_mode.css
+++ b/static/styles/night_mode.css
@@ -335,12 +335,6 @@ on a dark background, and don't change the dark labels dark either. */
         opacity: 0.2;
     }
 
-    #about-zulip {
-        .about-zulip-version {
-            color: hsl(212, 17%, 81%);
-        }
-    }
-
     #gear_menu_about_zulip {
         .white_zulip_icon_without_text {
             filter: invert(10%) sepia(16%) saturate(175%) hue-rotate(194deg)
diff --git a/static/styles/zulip.css b/static/styles/zulip.css
index 93409be964..2a61462c29 100644
--- a/static/styles/zulip.css
+++ b/static/styles/zulip.css
@@ -2720,41 +2720,17 @@ select.inline_select_topic_edit {
     }
 
     .overlay-content {
-        position: relative;
-        width: 300px;
+        width: 440px;
         border-radius: 4px;
     }
 
-    .modal-body {
-        display: flex;
-        flex-direction: column;
-        align-items: center;
-    }
-
     .about-zulip-logo {
-        padding-top: 20px;
-        height: 70px;
+        text-align: center;
+        margin: 30px;
     }
 
-    .about-zulip-title {
-        font-weight: 600;
-        padding: 10px;
-    }
-
-    .about-zulip-version {
-        color: hsl(222, 8%, 28%);
-
-        .fa-copy {
-            padding-left: 3px;
-        }
-
-        :hover {
-            cursor: pointer;
-
-            .fa-copy {
-                color: hsl(0, 0%, 0%);
-            }
-        }
+    .about-zulip-logo img {
+        height: 40px;
     }
 }
 
diff --git a/templates/zerver/app/about-zulip.html b/templates/zerver/app/about-zulip.html
index af94ba3713..dce83b3058 100644
--- a/templates/zerver/app/about-zulip.html
+++ b/templates/zerver/app/about-zulip.html
@@ -1,16 +1,30 @@
-<div id="about-zulip" class="overlay flex new-style" tabindex="-1" role="dialog" data-overlay="about-zulip"
-  aria-labelledby="about-zulip-label" aria-hidden="true">
+<div id="about-zulip" class="overlay flex new-style" tabindex="-1" role="dialog" data-overlay="about-zulip" aria-hidden="true">
     <div class="overlay-content modal-bg">
         <button type="button" class="exit" aria-label="{{ _('Close') }}"><span aria-hidden="true">&times;</span></button>
         <div class="modal-body">
-            <img class="about-zulip-logo" src="/static/images/logo/zulip-icon-128x128.png" alt="" />
-            <div class="about-zulip-title">Zulip</div>
-            <p class="about-zulip-version">
-                {{zulip_version_name}}
-                <i class="fa fa-copy tippy-zulip-tooltip" data-tippy-content="Copy version" data-tippy-placement="right" data-clipboard-text="{{zulip_version}}"></i>
+            <div class="about-zulip-logo">
+                <img src="/static/images/logo/zulip-org-logo.svg" alt="" />
+            </div>
+            <p>
+                This is an installation of <a target="_blank" rel="noopener noreferrer"
+                                             href="https://zulip.com">Zulip</a>.
             </p>
             <p>
-              Zulip is <a target="_blank" rel="noopener noreferrer" href="https://github.com/zulip/zulip">open-source software</a>.</p>
+                Zulip Server version {{zulip_version}}
+                <i class="fa fa-copy tippy-zulip-tooltip" data-tippy-content="Copy version" data-tippy-placement="right" data-clipboard-text="{{zulip_version}}"></i>
+                {% if zulip_merge_base and zulip_version != zulip_merge_base %}
+                <br />
+                Forked from upstream at {{zulip_merge_base}}
+                <i class="fa fa-copy tippy-zulip-tooltip" data-tippy-content="Copy version" data-tippy-placement="right" data-clipboard-text="{{zulip_merge_base}}"></i>
+                {% endif %}
+            </p>
+            <p>
+                Copyright 2012–2015 Dropbox, Inc., 2015–2021 Kandra Labs, Inc., and contributors.
+            </p>
+            <p>
+                Zulip is <a target="_blank" rel="noopener noreferrer" href="https://github.com/zulip/zulip#readme">open-source software</a>,
+                distributed under the Apache 2.0 license.
+            </p>
         </div>
     </div>
 </div>
diff --git a/tools/cache-zulip-git-version b/tools/cache-zulip-git-version
index 330a6cd854..e125e1187c 100755
--- a/tools/cache-zulip-git-version
+++ b/tools/cache-zulip-git-version
@@ -1,5 +1,13 @@
 #!/usr/bin/env bash
-set -e
+set -eu
 
 cd "$(dirname "$0")/.."
-git describe --tags --match='[0-9]*' >zulip-git-version || true
+remote="$(git config zulip.zulipRemote)" || remote=upstream
+{
+    git describe --always --tags --match='[0-9]*'
+    branches="$(git for-each-ref --format='%(objectname)' "refs/remotes/$remote/master" "refs/remotes/$remote/*.x")"
+    mapfile -t branches <<<"$branches"
+    if merge_base="$(git merge-base -- HEAD "${branches[@]}")"; then
+        git describe --always --tags --match='[0-9]*' -- "$merge_base"
+    fi
+} >zulip-git-version
diff --git a/version.py b/version.py
index 14a45d00f7..5e847e9e54 100644
--- a/version.py
+++ b/version.py
@@ -1,15 +1,17 @@
 import os
 
 ZULIP_VERSION = "4.0-rc1+git"
+
 # Add information on number of commits and commit hash to version, if available
 zulip_git_version_file = os.path.join(
     os.path.dirname(os.path.abspath(__file__)), "zulip-git-version"
 )
+lines = [ZULIP_VERSION, ""]
 if os.path.exists(zulip_git_version_file):
     with open(zulip_git_version_file) as f:
-        version = f.read().strip()
-        if version:
-            ZULIP_VERSION = version
+        lines = f.readlines() + ["", ""]
+ZULIP_VERSION = lines.pop(0).strip()
+ZULIP_MERGE_BASE = lines.pop(0).strip()
 
 LATEST_MAJOR_VERSION = "3.0"
 LATEST_RELEASE_VERSION = "3.0"
diff --git a/zerver/context_processors.py b/zerver/context_processors.py
index 2523376993..024240d6fd 100644
--- a/zerver/context_processors.py
+++ b/zerver/context_processors.py
@@ -49,13 +49,6 @@ def common_context(user: UserProfile) -> Dict[str, Any]:
     }
 
 
-def get_zulip_version_name(zulip_version: str) -> str:
-    if zulip_version.endswith("+git"):
-        return "Zulip " + zulip_version[:-4]
-
-    return "Zulip " + zulip_version
-
-
 def get_realm_from_request(request: HttpRequest) -> Optional[Realm]:
     if hasattr(request, "user") and hasattr(request.user, "realm"):
         return request.user.realm
@@ -142,8 +135,6 @@ def zulip_default_context(request: HttpRequest) -> Dict[str, Any]:
         "request_language": get_language(),
     }
 
-    ZULIP_VERSION_NAME = get_zulip_version_name(ZULIP_VERSION)
-
     context = {
         "root_domain_landing_page": settings.ROOT_DOMAIN_LANDING_PAGE,
         "custom_logo_url": settings.CUSTOM_LOGO_URL,
@@ -169,7 +160,6 @@ def zulip_default_context(request: HttpRequest) -> Dict[str, Any]:
         "password_min_length": settings.PASSWORD_MIN_LENGTH,
         "password_min_guesses": settings.PASSWORD_MIN_GUESSES,
         "zulip_version": ZULIP_VERSION,
-        "zulip_version_name": ZULIP_VERSION_NAME,
         "user_is_authenticated": user_is_authenticated,
         "settings_path": settings_path,
         "secrets_path": secrets_path,
diff --git a/zerver/tests/test_context_processors.py b/zerver/tests/test_context_processors.py
deleted file mode 100644
index 9026bd8cb4..0000000000
--- a/zerver/tests/test_context_processors.py
+++ /dev/null
@@ -1,8 +0,0 @@
-from zerver.context_processors import get_zulip_version_name
-from zerver.lib.test_classes import ZulipTestCase
-
-
-class TestContextProcessors(ZulipTestCase):
-    def test_get_zulip_version_name(self) -> None:
-        self.assertEqual(get_zulip_version_name("4.0-dev+git"), "Zulip 4.0-dev")
-        self.assertEqual(get_zulip_version_name("4.0"), "Zulip 4.0")
diff --git a/zerver/views/home.py b/zerver/views/home.py
index e049bc2040..eb19692092 100644
--- a/zerver/views/home.py
+++ b/zerver/views/home.py
@@ -8,6 +8,7 @@ from django.shortcuts import redirect, render
 from django.urls import reverse
 from django.utils.cache import patch_cache_control
 
+from version import ZULIP_MERGE_BASE, ZULIP_VERSION
 from zerver.context_processors import get_valid_realm_from_request
 from zerver.decorator import web_public_view, zulip_login_required
 from zerver.forms import ToSForm
@@ -240,6 +241,8 @@ def home_real(request: HttpRequest) -> HttpResponse:
             "is_admin": user_permission_info.is_realm_admin,
             "is_guest": user_permission_info.is_guest,
             "color_scheme": user_permission_info.color_scheme,
+            "zulip_version": ZULIP_VERSION,
+            "zulip_merge_base": ZULIP_MERGE_BASE,
             "navbar_logo_url": navbar_logo_url,
             "show_webathena": user_permission_info.show_webathena,
             "embedded": narrow_stream is not None,