diff --git a/environment.yml b/environment.yml
index 9db34271..81ceb410 100644
--- a/environment.yml
+++ b/environment.yml
@@ -23,7 +23,7 @@ dependencies:
     - sphinxcontrib-custombutton @ https://github.com/edbook/sphinxcontrib-custombutton/archive/refs/tags/v2.0.zip
     - sphinxcontrib-datacamp @ https://github.com/edbook/sphinxcontrib-datacamp/archive/refs/tags/v2.0.zip
     - sphinxcontrib-geogebra @ https://github.com/edbook/sphinxcontrib-geogebra/archive/refs/tags/v2.0.zip
-    - sphinxcontrib-hoverrole @ https://github.com/edbook/sphinxcontrib-hoverrole/archive/refs/tags/v2.0.15.zip
+    - sphinxcontrib-hoverrole @ https://github.com/jokullah/sphinxcontrib-hoverrole/archive/refs/tags/v0.3.zip
     - sphinxcontrib-panopto @ https://github.com/edbook/sphinxcontrib-panopto/archive/refs/tags/v2.0.1.zip
     - sphinxcontrib-questionnaire @ https://github.com/edbook/sphinxcontrib-questionnaire/archive/refs/tags/v2.0.9.zip
     - sphinxcontrib-sagecell @ https://github.com/edbook/sphinxcontrib-sagecell/archive/refs/tags/v2.0.zip
diff --git a/projects/undirbuningur_stae/conf.py b/projects/undirbuningur_stae/conf.py
index ef8cbb4c..0472ace4 100644
--- a/projects/undirbuningur_stae/conf.py
+++ b/projects/undirbuningur_stae/conf.py
@@ -1 +1,3 @@
 from edbook.conf import *  # type: ignore
+
+hover_ordabok = "EDLISFR"
\ No newline at end of file
diff --git a/projects/undirbuningur_stae/kafli01.rst b/projects/undirbuningur_stae/kafli01.rst
index 1bd85c55..dfba757c 100644
--- a/projects/undirbuningur_stae/kafli01.rst
+++ b/projects/undirbuningur_stae/kafli01.rst
@@ -12,7 +12,7 @@ Talnakerfi
 Náttúrulegu tölurnar  :math:`\mathbb{N}`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Tölurnar :math:`0,1,2,3, \dots` köllum við :hover:`náttúrulegu tölurnar, náttúruleg tala`. :hover:`Mengi, mengi, 5` náttúrulegu talnanna er táknað með :math:`\mathbb{N}.`
+Tölurnar :math:`0,1,2,3, \dots` köllum við :hover:`náttúrulegu tölurnar, náttúruleg tala, RAFT`. :hover:`Mengi, mengi, 1` náttúrulegu talnanna er táknað með :math:`\mathbb{N}.`
 
 Heiltölurnar :math:`\mathbb{Z}`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -28,7 +28,7 @@ Mengi heiltalna er táknað með :math:`\mathbb{Z}`.
 
 Ræðu tölurnar :math:`\mathbb{Q}`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-:hover:`Ræðar tölur, ræð tala` samanstanda af öllum brotum :math:`\frac{p}{q}` þar sem :math:`p` og :math:`q` eru heilar tölur og :math:`q \neq 0`. Talan :math:`p` nefnist :hover:`teljari` brotsins og talan :math:`q` :hover:`nefnari` þess.
+:hover:`Ræðar tölur, ræð tala` samanstanda af öllum brotum :math:`\frac{p}{q}` þar sem :math:`p` og :math:`q` eru heilar tölur og :math:`q \neq 0`. Talan :math:`p` nefnist :hover:`teljari, teljari, 1` brotsins og talan :math:`q` :hover:`nefnari` þess.
 
 Mengi ræðra talna er táknað með :math:`\mathbb{Q}`.