diff --git a/javascript/ql/lib/semmle/javascript/internal/ConceptsShared.qll b/javascript/ql/lib/semmle/javascript/internal/ConceptsShared.qll
index c24a556d9d9..027e587d9d3 100644
--- a/javascript/ql/lib/semmle/javascript/internal/ConceptsShared.qll
+++ b/javascript/ql/lib/semmle/javascript/internal/ConceptsShared.qll
@@ -43,9 +43,6 @@ module Cryptography {
     /** Gets an input the algorithm is used on, for example the plain text input to be encrypted. */
     DataFlow::Node getAnInput() { result = super.getAnInput() }
 
-    /** DEPRECATED: Use `getAlgorithm().isWeak() or getBlockMode().isWeak()` instead */
-    deprecated predicate isWeak() { super.isWeak() }
-
     /**
      * Gets the block mode used to perform this cryptographic operation.
      * This may have no result - for example if the `CryptographicAlgorithm` used
@@ -70,9 +67,6 @@ module Cryptography {
       /** Gets an input the algorithm is used on, for example the plain text input to be encrypted. */
       abstract DataFlow::Node getAnInput();
 
-      /** DEPRECATED: Use `getAlgorithm().isWeak() or getBlockMode().isWeak()` instead */
-      deprecated predicate isWeak() { this.getAlgorithm().isWeak() or this.getBlockMode().isWeak() }
-
       /**
        * Gets the block mode used to perform this cryptographic operation.
        * This may have no result - for example if the `CryptographicAlgorithm` used
diff --git a/python/ql/lib/semmle/python/internal/ConceptsShared.qll b/python/ql/lib/semmle/python/internal/ConceptsShared.qll
index c24a556d9d9..027e587d9d3 100644
--- a/python/ql/lib/semmle/python/internal/ConceptsShared.qll
+++ b/python/ql/lib/semmle/python/internal/ConceptsShared.qll
@@ -43,9 +43,6 @@ module Cryptography {
     /** Gets an input the algorithm is used on, for example the plain text input to be encrypted. */
     DataFlow::Node getAnInput() { result = super.getAnInput() }
 
-    /** DEPRECATED: Use `getAlgorithm().isWeak() or getBlockMode().isWeak()` instead */
-    deprecated predicate isWeak() { super.isWeak() }
-
     /**
      * Gets the block mode used to perform this cryptographic operation.
      * This may have no result - for example if the `CryptographicAlgorithm` used
@@ -70,9 +67,6 @@ module Cryptography {
       /** Gets an input the algorithm is used on, for example the plain text input to be encrypted. */
       abstract DataFlow::Node getAnInput();
 
-      /** DEPRECATED: Use `getAlgorithm().isWeak() or getBlockMode().isWeak()` instead */
-      deprecated predicate isWeak() { this.getAlgorithm().isWeak() or this.getBlockMode().isWeak() }
-
       /**
        * Gets the block mode used to perform this cryptographic operation.
        * This may have no result - for example if the `CryptographicAlgorithm` used
diff --git a/ruby/ql/lib/codeql/ruby/Concepts.qll b/ruby/ql/lib/codeql/ruby/Concepts.qll
index 8bf21f7467a..2a473303c7a 100644
--- a/ruby/ql/lib/codeql/ruby/Concepts.qll
+++ b/ruby/ql/lib/codeql/ruby/Concepts.qll
@@ -826,5 +826,46 @@ module Logging {
  * to improve our libraries in the future to more precisely capture this aspect.
  */
 module Cryptography {
-  import codeql.ruby.internal.ConceptsShared::Cryptography
+  // Since we still rely on `isWeak` predicate on `CryptographicOperation` in Ruby, we
+  // modify that part of the shared concept... which means we have to explicitly
+  // re-export everything else.
+  // Using SC shorthand for "Shared Cryptography"
+  import codeql.ruby.internal.ConceptsShared::Cryptography as SC
+
+  class CryptographicAlgorithm = SC::CryptographicAlgorithm;
+
+  class EncryptionAlgorithm = SC::EncryptionAlgorithm;
+
+  class HashingAlgorithm = SC::HashingAlgorithm;
+
+  class PasswordHashingAlgorithm = SC::PasswordHashingAlgorithm;
+
+  /**
+   * A data-flow node that is an application of a cryptographic algorithm. For example,
+   * encryption, decryption, signature-validation.
+   *
+   * Extend this class to refine existing API models. If you want to model new APIs,
+   * extend `CryptographicOperation::Range` instead.
+   */
+  class CryptographicOperation extends SC::CryptographicOperation instanceof CryptographicOperation::Range {
+    /** DEPRECATED: Use `getAlgorithm().isWeak() or getBlockMode().isWeak()` instead */
+    deprecated predicate isWeak() { super.isWeak() }
+  }
+
+  /** Provides classes for modeling new applications of a cryptographic algorithms. */
+  module CryptographicOperation {
+    /**
+     * A data-flow node that is an application of a cryptographic algorithm. For example,
+     * encryption, decryption, signature-validation.
+     *
+     * Extend this class to model new APIs. If you want to refine existing API models,
+     * extend `CryptographicOperation` instead.
+     */
+    abstract class Range extends SC::CryptographicOperation::Range {
+      /** DEPRECATED: Use `getAlgorithm().isWeak() or getBlockMode().isWeak()` instead */
+      deprecated predicate isWeak() { this.getAlgorithm().isWeak() or this.getBlockMode().isWeak() }
+    }
+  }
+
+  class BlockMode = SC::BlockMode;
 }
diff --git a/ruby/ql/lib/codeql/ruby/internal/ConceptsShared.qll b/ruby/ql/lib/codeql/ruby/internal/ConceptsShared.qll
index c24a556d9d9..027e587d9d3 100644
--- a/ruby/ql/lib/codeql/ruby/internal/ConceptsShared.qll
+++ b/ruby/ql/lib/codeql/ruby/internal/ConceptsShared.qll
@@ -43,9 +43,6 @@ module Cryptography {
     /** Gets an input the algorithm is used on, for example the plain text input to be encrypted. */
     DataFlow::Node getAnInput() { result = super.getAnInput() }
 
-    /** DEPRECATED: Use `getAlgorithm().isWeak() or getBlockMode().isWeak()` instead */
-    deprecated predicate isWeak() { super.isWeak() }
-
     /**
      * Gets the block mode used to perform this cryptographic operation.
      * This may have no result - for example if the `CryptographicAlgorithm` used
@@ -70,9 +67,6 @@ module Cryptography {
       /** Gets an input the algorithm is used on, for example the plain text input to be encrypted. */
       abstract DataFlow::Node getAnInput();
 
-      /** DEPRECATED: Use `getAlgorithm().isWeak() or getBlockMode().isWeak()` instead */
-      deprecated predicate isWeak() { this.getAlgorithm().isWeak() or this.getBlockMode().isWeak() }
-
       /**
        * Gets the block mode used to perform this cryptographic operation.
        * This may have no result - for example if the `CryptographicAlgorithm` used