diff --git a/java/ql/lib/semmle/code/java/security/ExternallyControlledFormatStringQuery.qll b/java/ql/lib/semmle/code/java/security/ExternallyControlledFormatStringQuery.qll
index 64448b9012a..25d4e2b4fa5 100644
--- a/java/ql/lib/semmle/code/java/security/ExternallyControlledFormatStringQuery.qll
+++ b/java/ql/lib/semmle/code/java/security/ExternallyControlledFormatStringQuery.qll
@@ -1,8 +1,8 @@
 /** Provides a taint-tracking configuration to reason about externally controlled format string vulnerabilities. */
 
 import java
-import semmle.code.java.dataflow.FlowSources
-import semmle.code.java.StringFormat
+private import semmle.code.java.dataflow.FlowSources
+private import semmle.code.java.StringFormat
 
 /**
  * A taint-tracking configuration for externally controlled format string vulnerabilities.
diff --git a/java/ql/lib/semmle/code/java/security/ResponseSplittingQuery.qll b/java/ql/lib/semmle/code/java/security/ResponseSplittingQuery.qll
index 95eaab22e0d..5ac4953422a 100644
--- a/java/ql/lib/semmle/code/java/security/ResponseSplittingQuery.qll
+++ b/java/ql/lib/semmle/code/java/security/ResponseSplittingQuery.qll
@@ -1,7 +1,7 @@
 /** Provides a taint tracking configuration to reason about response splitting vulnerabilities. */
 
 import java
-import semmle.code.java.dataflow.FlowSources
+private import semmle.code.java.dataflow.FlowSources
 import semmle.code.java.security.ResponseSplitting
 
 /**
diff --git a/java/ql/lib/semmle/code/java/security/ZipSlipQuery.qll b/java/ql/lib/semmle/code/java/security/ZipSlipQuery.qll
index 78499c69be0..6eaa372075b 100644
--- a/java/ql/lib/semmle/code/java/security/ZipSlipQuery.qll
+++ b/java/ql/lib/semmle/code/java/security/ZipSlipQuery.qll
@@ -1,8 +1,6 @@
 /** Provides dataflow configurations to be used in ZipSlip queries. */
 
 import java
-import semmle.code.java.controlflow.Guards
-import semmle.code.java.dataflow.SSA
 import semmle.code.java.dataflow.TaintTracking
 import semmle.code.java.security.PathSanitizer
 private import semmle.code.java.dataflow.ExternalFlow