diff --git a/scripts/requirements_cp36-cp36m.txt b/scripts/requirements_cp36-cp36m.txt
index 9e1e5d4..3553d2f 100644
--- a/scripts/requirements_cp36-cp36m.txt
+++ b/scripts/requirements_cp36-cp36m.txt
@@ -5,5 +5,5 @@ cython==0.28.2
 pandas==0.23.0
 h5py==2.7.1
 pytest==3.5.1
-pyyaml==3.12
+pyyaml==5.4
 MDAnalysis==0.19.2
\ No newline at end of file
diff --git a/scripts/requirements_cp37-cp37m.txt b/scripts/requirements_cp37-cp37m.txt
index f8802c0..3904279 100644
--- a/scripts/requirements_cp37-cp37m.txt
+++ b/scripts/requirements_cp37-cp37m.txt
@@ -5,5 +5,5 @@ cython==0.29.15
 pandas==1.0.1
 h5py==2.10.0
 pytest==5.3.5
-pyyaml==5.3
+pyyaml==5.4
 MDAnalysis==1.0.0
\ No newline at end of file
diff --git a/scripts/requirements_cp38-cp38.txt b/scripts/requirements_cp38-cp38.txt
index 52dfc63..c7fae39 100644
--- a/scripts/requirements_cp38-cp38.txt
+++ b/scripts/requirements_cp38-cp38.txt
@@ -5,5 +5,5 @@ cython==0.29.21
 pandas==1.0.1
 h5py==2.10.0
 pytest==5.4.3
-pyyaml==5.3.1
+pyyaml==5.4
 MDAnalysis==1.1.1
\ No newline at end of file
diff --git a/scripts/requirements_cp39-cp39.txt b/scripts/requirements_cp39-cp39.txt
index f427487..4745482 100644
--- a/scripts/requirements_cp39-cp39.txt
+++ b/scripts/requirements_cp39-cp39.txt
@@ -5,5 +5,5 @@ cython==0.29.24
 pandas==1.3.4
 h5py==3.3.0
 pytest==6.2.4
-pyyaml==6.0
+pyyaml==5.4
 MDAnalysis==2.0.0
\ No newline at end of file