diff --git a/README.md b/README.md
index 547ec96..3819ffa 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ There are also groups over on Mastodon that you can use to connect to fellow aca
 - [@anthropology@a.gup.pe](https://social.tchncs.de/web/@anthropology@a.gup.pe)
 - [@antiquidons@a.gup.pe](https://a.gup.pe/u/antiquidons)
 - [@archaeodons@a.gup.pe](https://social.tchncs.de/web/@archaeodons@a.gup.pe)
-- [@biophysics@a.gup.pe](@biophysics@a.gup.pe)
+- [@biophysics@a.gup.pe](https://a.gup.pe/u/biophysics)
 - [@cognition@a.gup.pe](https://a.gup.pe/u/cognition) (cognitive psychology)
 - [@cogsci@a.gup.pe](https://a.gup.pe/u/cogsci)
 - [@ecologies@a.gup.pe](https://a.gup.pe/u/ecologies)
@@ -79,10 +79,10 @@ There are also groups over on Mastodon that you can use to connect to fellow aca
 - [@geodons@a.gup.pe](https://a.gup.pe/u/geodons)
 - [@histodons@a.gup.pe](https://a.gup.pe/u/histodons)
 - [@julialang@a.gup.pe](https://a.gup.pe/u/julialang) (The Julia programming language)
-- [@mechanobiology@a.gup.pe](@mechanobiology@a.gup.pe)
+- [@mechanobiology@a.gup.pe](https://a.gup.pe/u/mechanobiology)
 - [@paleodons@a.gup.pe](https://a.gup.pe/u/paleodons)
 - [@philosophy@a.gup.pe](https://a.gup.pe/u/philosophy)
-- [@politicalscience@a.gup.pe](@politicalscience@a.gup.pe)
+- [@politicalscience@a.gup.pe](https://a.gup.pe/u/politicalscience)
 - [@rstats@a.gup.pe](https://a.gup.pe/u/rstats) (The R language for statistical computing)
 - [@seresearchers@a.gup.pe](https://a.gup.pe/u/seresearchers) (Software Engineering)
 - [@sociology@a.gup.pe](https://a.gup.pe/u/sociology)