diff --git a/requirements.txt b/requirements.txt
index 5ea5e9a..80f7b3b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ lxml==4.4.0
 mpmath==1.1.0
 numpy==1.17.3
 matplotlib==3.0.2
-sympy==1.5.1
+sympy==1.13.3
 cryptography==2.8
 seaborn==0.9.0
 pyOpenSSL==19.0.0
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 5ea5e9a..80f7b3b 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -4,7 +4,7 @@ lxml==4.4.0
 mpmath==1.1.0
 numpy==1.17.3
 matplotlib==3.0.2
-sympy==1.5.1
+sympy==1.13.3
 cryptography==2.8
 seaborn==0.9.0
 pyOpenSSL==19.0.0
diff --git a/requirements/prod.txt b/requirements/prod.txt
index 5ea5e9a..80f7b3b 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -4,7 +4,7 @@ lxml==4.4.0
 mpmath==1.1.0
 numpy==1.17.3
 matplotlib==3.0.2
-sympy==1.5.1
+sympy==1.13.3
 cryptography==2.8
 seaborn==0.9.0
 pyOpenSSL==19.0.0
diff --git a/requirements/test.txt b/requirements/test.txt
index 5ea5e9a..80f7b3b 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -4,7 +4,7 @@ lxml==4.4.0
 mpmath==1.1.0
 numpy==1.17.3
 matplotlib==3.0.2
-sympy==1.5.1
+sympy==1.13.3
 cryptography==2.8
 seaborn==0.9.0
 pyOpenSSL==19.0.0