diff --git a/latex/paquets.sty b/latex/paquets.sty
index aa8112c..23959b0 100644
--- a/latex/paquets.sty
+++ b/latex/paquets.sty
@@ -69,6 +69,11 @@
 \def\tmit#1{\text{\fontspec{texgyrepagella-italic.otf}[Scale = MatchLowercase] #1}}
 \let\mtit\tmit
 \let\textdef\textit
+
+\setsansfont{Latin Modern Sans}
+\setmathsf{Latin Modern Sans}
+
+
 \@ifclassloaded{scrartcl}{
 \addtokomafont{disposition}{\rmfamily}
 \setkomafont{descriptionlabel}{\bfseries}
diff --git a/latex/yssymbols.sty b/latex/yssymbols.sty
index 3f1c2e7..76bb838 100644
--- a/latex/yssymbols.sty
+++ b/latex/yssymbols.sty
@@ -12,11 +12,12 @@
 \def\Ifo{\genint\lbr\lbr,}
 \def\Ioo{\genint\rbr\lbr,}
 \def\Iof{\genint\rbr\rbr,}
-\def\R{\mathbb{R}}
-\def\Q{\mathbb{Q}}
-\def\N{\mathbb{N}}
-\def\Z{\mathbb{Z}}
-\def\C{\mathbb{C}}
+\def\R{{\mathbb{R}}}
+\def\Q{{\mathbb{Q}}}
+\def\N{{\mathbb{N}}}
+\def\Z{{\mathbb{Z}}}
+\def\C{{\mathbb{C}}}
+\def\B{{\mathbb{B}}}
 \def\diff{\mathrm d}
 \def\e{\mathrm e}
 \def\enstq#1#2{\left\{ #1 \ \middle|\ #2\right\}}