diff --git a/src/caselaw_extraction/requirements.txt b/src/caselaw_extraction/requirements.txt
index 3261699c1..dbc04bf4d 100644
--- a/src/caselaw_extraction/requirements.txt
+++ b/src/caselaw_extraction/requirements.txt
@@ -6,6 +6,6 @@ pandas==2.2.0
 # psycopg2-binary==2.9.1
 psycopg2-binary==2.9.9
 beautifulsoup4==4.12.3
-lxml==4.9.4
+lxml==5.1.0
 sqlalchemy==2.0.25
 aws_lambda_powertools==2.32.0
diff --git a/src/lambdas/extract_judgement_contents/requirements.txt b/src/lambdas/extract_judgement_contents/requirements.txt
index d0aa337b1..6f5f9ca7c 100644
--- a/src/lambdas/extract_judgement_contents/requirements.txt
+++ b/src/lambdas/extract_judgement_contents/requirements.txt
@@ -1,4 +1,4 @@
 beautifulsoup4==4.12.3
-lxml==4.9.4
+lxml==5.1.0
 pandas==2.2.0
 aws_lambda_powertools==2.32.0
diff --git a/src/lambdas/make_replacements/requirements.txt b/src/lambdas/make_replacements/requirements.txt
index eaa02618e..167113424 100644
--- a/src/lambdas/make_replacements/requirements.txt
+++ b/src/lambdas/make_replacements/requirements.txt
@@ -1,3 +1,3 @@
 beautifulsoup4==4.12.3
-lxml==4.9.4
+lxml==5.1.0
 aws_lambda_powertools==2.32.0
diff --git a/src/lambdas/xml_validate/requirements.txt b/src/lambdas/xml_validate/requirements.txt
index 3d191428c..cbdb2f608 100644
--- a/src/lambdas/xml_validate/requirements.txt
+++ b/src/lambdas/xml_validate/requirements.txt
@@ -1,2 +1,2 @@
-lxml==4.9.4
+lxml==5.1.0
 aws_lambda_powertools==2.32.0
diff --git a/src/legislation_provisions_extraction/requirements.txt b/src/legislation_provisions_extraction/requirements.txt
index a6d01b1e6..27490a7e8 100644
--- a/src/legislation_provisions_extraction/requirements.txt
+++ b/src/legislation_provisions_extraction/requirements.txt
@@ -1,5 +1,5 @@
 
 numpy==1.26.3
 beautifulsoup4==4.12.3
-lxml==4.9.4
+lxml==5.1.0
 aws_lambda_powertools==2.32.0
diff --git a/src/oblique_references/requirements.txt b/src/oblique_references/requirements.txt
index eaa02618e..167113424 100644
--- a/src/oblique_references/requirements.txt
+++ b/src/oblique_references/requirements.txt
@@ -1,3 +1,3 @@
 beautifulsoup4==4.12.3
-lxml==4.9.4
+lxml==5.1.0
 aws_lambda_powertools==2.32.0
diff --git a/src/replacer/requirements.txt b/src/replacer/requirements.txt
index eaa02618e..167113424 100644
--- a/src/replacer/requirements.txt
+++ b/src/replacer/requirements.txt
@@ -1,3 +1,3 @@
 beautifulsoup4==4.12.3
-lxml==4.9.4
+lxml==5.1.0
 aws_lambda_powertools==2.32.0
diff --git a/src/tests/requirements.txt b/src/tests/requirements.txt
index cea9edfca..1e00be530 100644
--- a/src/tests/requirements.txt
+++ b/src/tests/requirements.txt
@@ -4,7 +4,7 @@ pandas==2.2.0
 psycopg2==2.9.9
 beautifulsoup4==4.12.3
 spaczz==0.6.0
-lxml==4.9.4
+lxml==5.1.0
 testing.postgresql==1.3.0
 sqlalchemy==2.0.25
 coverage==7.4.0
@@ -17,6 +17,6 @@ psycopg==3.1.17
 SPARQLWrapper==2.0.0
 python-dotenv==1.0.0
 rapidfuzz==3.6.1
-ds-caselaw-marklogic-api-client==18.0.0
+ds-caselaw-marklogic-api-client==19.1.0
 boto3-stubs[essential] ==1.34.25
 aws_lambda_powertools ==2.32.0
diff --git a/src/utils/requirements.txt b/src/utils/requirements.txt
index 61742203e..5646b0ce8 100644
--- a/src/utils/requirements.txt
+++ b/src/utils/requirements.txt
@@ -1,3 +1,3 @@
 beautifulsoup4==4.12.3
-lxml==4.9.4
+lxml==5.1.0
 pandas==2.2.0