diff --git a/.readthedocs.yml b/.readthedocs.yml
index f8b3c31c57..563e6df7ce 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -16,6 +16,9 @@ sphinx:
     fail_on_warning: false
     configuration: docs/conf.py
 
+formats:
+  - pdf
+
 python:
     install:
         - requirements: requirements-dev.txt
diff --git a/docs/conf.py b/docs/conf.py
index e4623e69f6..97a50a13c9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -170,7 +170,12 @@ def __call__(self, app, docname, source):
 # -- Options for LaTeX output ---------------------------------------------
 
 latex_elements = {
-    "preamble": r"\usepackage{enumitem}\setlistdepth{99}",
+    "preamble": r'''
+\usepackage{enumitem}
+\setlistdepth{99}
+\DeclareUnicodeCharacter{22C5}{$\cdot$}
+\DeclareUnicodeCharacter{21AA}{$\hookrightarrow$}
+''',
 }
 
 # Grouping the document tree into LaTeX files. List of tuples