diff --git a/constants.py b/constants.py
index 5b03712..f120878 100644
--- a/constants.py
+++ b/constants.py
@@ -142,7 +142,7 @@ SPECJALNE_ZIEMNIACZKI = GPT_SETTINGS[1]
 ASSISTANTS = {}
 
 
-LATEX_TEX_ENGINE = "pdflatex"
+LATEX_TEX_ENGINE = "tectonic"
 LATEX_MAX_COMPILE_SECONDS = 45
 LATEX_MAX_ATTACH_MB = 8
 LATEX_MAX_ZIP_MB =  25