diff --git a/docs/source/conf.py b/docs/source/conf.py
index 8f527ca8be..7c525a5f56 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -146,7 +146,7 @@
         {
             'name': 'Twitter',
             'url': 'https://www.twitter.com/aiidateam',
-            'icon': 'fa-brands fa-twitter-square',
+            'icon': 'fa-brands fa-square-x-twitter',
             'type': 'fontawesome',
         },
     ],
diff --git a/pyproject.toml b/pyproject.toml
index 51a8ebbb8e..2982a26cae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -191,7 +191,7 @@ bpython = [
   'bpython~=0.18.0'
 ]
 docs = [
-  'pydata-sphinx-theme~=0.13.3',
+  'pydata-sphinx-theme~=0.15.1',
   'sphinx~=7.2',
   'sphinx-copybutton~=0.5.0',
   'sphinx-design~=0.5.0',
diff --git a/requirements/requirements-py-3.10.txt b/requirements/requirements-py-3.10.txt
index fed50236ae..e9c9e0a079 100644
--- a/requirements/requirements-py-3.10.txt
+++ b/requirements/requirements-py-3.10.txt
@@ -133,7 +133,7 @@ pybtex==0.24.0
 pycifrw==4.4.5
 pycparser==2.21
 pydantic==2.4.0
-pydata-sphinx-theme==0.13.3
+pydata-sphinx-theme==0.15.1
 pygments==2.15.1
 pymatgen==2023.9.25
 pympler==1.0.1
diff --git a/requirements/requirements-py-3.11.txt b/requirements/requirements-py-3.11.txt
index b6402242f7..183e5181b9 100644
--- a/requirements/requirements-py-3.11.txt
+++ b/requirements/requirements-py-3.11.txt
@@ -132,7 +132,7 @@ pybtex==0.24.0
 pycifrw==4.4.5
 pycparser==2.21
 pydantic==2.4.0
-pydata-sphinx-theme==0.13.3
+pydata-sphinx-theme==0.15.1
 pygments==2.15.1
 pymatgen==2023.9.25
 pympler==1.0.1
diff --git a/requirements/requirements-py-3.12.txt b/requirements/requirements-py-3.12.txt
index 4e634d5a09..71786d7003 100644
--- a/requirements/requirements-py-3.12.txt
+++ b/requirements/requirements-py-3.12.txt
@@ -130,7 +130,7 @@ pybtex==0.24.0
 pycifrw==4.4.5
 pycparser==2.21
 pydantic==2.4.0
-pydata-sphinx-theme==0.13.3
+pydata-sphinx-theme==0.15.1
 pygments==2.16.1
 pymatgen==2023.10.11
 pympler==1.0.1
diff --git a/requirements/requirements-py-3.9.txt b/requirements/requirements-py-3.9.txt
index 2d77497e31..214a70f8d9 100644
--- a/requirements/requirements-py-3.9.txt
+++ b/requirements/requirements-py-3.9.txt
@@ -135,7 +135,7 @@ pybtex==0.24.0
 pycifrw==4.4.5
 pycparser==2.21
 pydantic==2.4.0
-pydata-sphinx-theme==0.13.3
+pydata-sphinx-theme==0.15.1
 pygments==2.15.1
 pymatgen==2023.9.25
 pympler==1.0.1