diff --git a/buildSrc/version.properties b/buildSrc/version.properties
index 1180613e91350..6268b11663bd4 100644
--- a/buildSrc/version.properties
+++ b/buildSrc/version.properties
@@ -25,7 +25,7 @@ joda              = 2.10.12
 # when updating this version, you need to ensure compatibility with:
 #  - plugins/ingest-attachment (transitive dependency, check the upstream POM)
 #  - distribution/tools/plugin-cli
-bouncycastle=1.64
+bouncycastle=1.70
 # test dependencies
 randomizedrunner  = 2.7.1
 junit             = 4.12
diff --git a/plugins/ingest-attachment/licenses/bcmail-jdk15on-1.64.jar.sha1 b/plugins/ingest-attachment/licenses/bcmail-jdk15on-1.64.jar.sha1
deleted file mode 100644
index 9b752aae5adbf..0000000000000
--- a/plugins/ingest-attachment/licenses/bcmail-jdk15on-1.64.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-7a2601f0a1d336966cca03edb04a69ba0f5f25d9
\ No newline at end of file
diff --git a/plugins/ingest-attachment/licenses/bcmail-jdk15on-1.70.jar.sha1 b/plugins/ingest-attachment/licenses/bcmail-jdk15on-1.70.jar.sha1
new file mode 100644
index 0000000000000..672e479eda8d7
--- /dev/null
+++ b/plugins/ingest-attachment/licenses/bcmail-jdk15on-1.70.jar.sha1
@@ -0,0 +1 @@
+08f4aafad90f6cc7f16b9992279828ae848c9e0d
\ No newline at end of file
diff --git a/plugins/ingest-attachment/licenses/bcpkix-jdk15on-1.64.jar.sha1 b/plugins/ingest-attachment/licenses/bcpkix-jdk15on-1.64.jar.sha1
deleted file mode 100644
index 568a9be16bee7..0000000000000
--- a/plugins/ingest-attachment/licenses/bcpkix-jdk15on-1.64.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-3dac163e20110817d850d17e0444852a6d7d0bd7
\ No newline at end of file
diff --git a/plugins/ingest-attachment/licenses/bcpkix-jdk15on-1.70.jar.sha1 b/plugins/ingest-attachment/licenses/bcpkix-jdk15on-1.70.jar.sha1
new file mode 100644
index 0000000000000..e348463a21257
--- /dev/null
+++ b/plugins/ingest-attachment/licenses/bcpkix-jdk15on-1.70.jar.sha1
@@ -0,0 +1 @@
+f81e5af49571a9d5a109a88f239a73ce87055417
\ No newline at end of file
diff --git a/plugins/ingest-attachment/licenses/bcprov-jdk15on-1.64.jar.sha1 b/plugins/ingest-attachment/licenses/bcprov-jdk15on-1.64.jar.sha1
deleted file mode 100644
index 85b5d4e1e1805..0000000000000
--- a/plugins/ingest-attachment/licenses/bcprov-jdk15on-1.64.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-1467dac1b787b5ad2a18201c0c281df69882259e
\ No newline at end of file
diff --git a/plugins/ingest-attachment/licenses/bcprov-jdk15on-1.70.jar.sha1 b/plugins/ingest-attachment/licenses/bcprov-jdk15on-1.70.jar.sha1
new file mode 100644
index 0000000000000..f5e89c0f5ed45
--- /dev/null
+++ b/plugins/ingest-attachment/licenses/bcprov-jdk15on-1.70.jar.sha1
@@ -0,0 +1 @@
+4636a0d01f74acaf28082fb62b317f1080118371
\ No newline at end of file