diff --git a/requirements.txt b/requirements.txt
index 863188880..98dd20349 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pretext == 2.24.0
+pretext == 2.29.2
CodeChat-Server == 0.2.25
pelican == 4.11.0
markdown == 3.7.0
diff --git a/source/linear-algebra/source/05-GT/01.ptx b/source/linear-algebra/source/05-GT/01.ptx
index ab533b493..0170b2687 100644
--- a/source/linear-algebra/source/05-GT/01.ptx
+++ b/source/linear-algebra/source/05-GT/01.ptx
@@ -45,7 +45,7 @@ defined by the standard basic vectors \vec e_1,\vec e_2.
Tool to visualize a linear transformation from \mathbb R^2 to \mathbb R^2
-
+
@@ -297,7 +297,7 @@ area of resulting parallelogram, what is the value of \det([\vec{e}_1\hspace{
-
+
@@ -315,7 +315,7 @@ area of resulting parallelogram, what is the value of \det([\vec{e}_1\hspace{
-
+
@@ -340,7 +340,7 @@ parallelogram.
-
+
@@ -413,7 +413,7 @@ The determinant must also satisfy other properties.
Consider \det([\vec v \hspace{1em}\vec w+c \vec{v}]) and
\det([\vec v\hspace{1em}\vec w]).
-
+
diff --git a/source/linear-algebra/source/05-GT/03.ptx b/source/linear-algebra/source/05-GT/03.ptx
index 1a8efede2..34858d97a 100644
--- a/source/linear-algebra/source/05-GT/03.ptx
+++ b/source/linear-algebra/source/05-GT/03.ptx
@@ -164,7 +164,7 @@ and we call this \lambda an eigenvalueeigenvalue
-
+