diff --git a/_includes/head/custom.html b/_includes/head/custom.html
index 4a880c86..8116150d 100644
--- a/_includes/head/custom.html
+++ b/_includes/head/custom.html
@@ -9,6 +9,15 @@
   unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
 }
 
+@font-face {
+  font-family: 'IBM Plex Sans';
+  font-style: italic;
+  font-weight: 400;
+  font-display: swap;
+  src: url(https://pghvlaans.github.io/sbotools3/assets/fonts/IBMPlexSans-Italic.ttf) format('truetype');
+  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+}
+
 @font-face {
   font-family: 'IBM Plex Sans';
   font-style: normal;
@@ -18,6 +27,15 @@
   unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
 }
 
+@font-face {
+  font-family: 'IBM Plex Sans';
+  font-style: italic;
+  font-weight: 700;
+  font-display: swap;
+  src: url(https://pghvlaans.github.io/sbotools3/assets/fonts/IBMPlexSans-BoldItalic.ttf) format('truetype');
+  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+}
+
 @font-face {
   font-family: 'IBM Plex Mono';
   font-style: normal;
diff --git a/assets/fonts/IBMPlexSans-BoldItalic.ttf b/assets/fonts/IBMPlexSans-BoldItalic.ttf
new file mode 100644
index 00000000..e07bc1f5
Binary files /dev/null and b/assets/fonts/IBMPlexSans-BoldItalic.ttf differ
diff --git a/assets/fonts/IBMPlexSans-Italic.ttf b/assets/fonts/IBMPlexSans-Italic.ttf
new file mode 100644
index 00000000..efe8a1fb
Binary files /dev/null and b/assets/fonts/IBMPlexSans-Italic.ttf differ