diff --git a/.github/workflows/ci_docs.yml b/.github/workflows/ci_docs.yml
index be5e7ed5a57..ab904cf6a0d 100644
--- a/.github/workflows/ci_docs.yml
+++ b/.github/workflows/ci_docs.yml
@@ -116,7 +116,7 @@ jobs:
             sphinx_rtd_theme
             cairosvg
             sphinxcontrib-svg2pdfconverter
-            tectonic=0.15
+            tectonic
 
       # Download cached remote files (artifacts) from GitHub
       - name: Download remote data from GitHub
diff --git a/environment.yml b/environment.yml
index bf9c9f44c51..ccd85758ab4 100644
--- a/environment.yml
+++ b/environment.yml
@@ -46,7 +46,7 @@ dependencies:
     # Dev dependencies (building PDF documentation)
     - cairosvg
     - sphinxcontrib-svg2pdfconverter
-    - tectonic=0.15
+    - tectonic
     # Dev dependencies (type hints)
     - mypy
     - pandas-stubs