diff --git a/lectures/l00_spice.md b/lectures/l00_spice.md
index 3a53c30..c2cf32d 100644
--- a/lectures/l00_spice.md
+++ b/lectures/l00_spice.md
@@ -271,7 +271,7 @@ Strong $$ \frac{g_m}{I_d} = \frac{2}{V_{eff}}$$
 
 # More information
 
-[Ngspice Manual](http://ngspice.sourceforge.net/docs/ngspice-34-manual.pdf)
+[Ngspice Manual](http://ngspice.sourceforge.net/docs/ngspice-43-manual.pdf)
 
 [Installing tools](https://analogicus.com/aicex/started/)