diff --git a/docs/configuration.md b/docs/configuration.md
index 64423172..9204d64f 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -67,6 +67,13 @@ reviewed:
   - classlist # public domain
   - octicons
 
+# Specify additional license terms that have been obtained from a dependency's owner
+# which apply to the dependency's license 
+additional_terms:
+  bundler:
+    bcrypt-ruby:
+      - .licenses/amendments/bundler/bcrypt-ruby/amendment.txt
+
 # A single configuration file can be used to enumerate dependencies for multiple
 # projects.  Each configuration is referred to as an "application" and must include
 # a source path, at a minimum
diff --git a/docs/configuration/README.md b/docs/configuration/README.md
index 9e5640be..2bc1cef8 100644
--- a/docs/configuration/README.md
+++ b/docs/configuration/README.md
@@ -9,3 +9,4 @@
 1. [Allowed licenses](./allowed_licenses.md)
 1. [Ignoring dependencies](./ignoring_dependencies.md)
 1. [Reviewing dependencies](./reviewing_dependencies.md)
+1. [Additional license terms](./additional_terms.md)
diff --git a/docs/configuration/additional_terms.md b/docs/configuration/additional_terms.md
new file mode 100644
index 00000000..f531ad93
--- /dev/null
+++ b/docs/configuration/additional_terms.md
@@ -0,0 +1,41 @@
+# Additional terms
+
+The `additional_terms` configuration option is used to specify paths to files containing extra licensing terms that do not ship with the dependency package. All files specified are expected to be plain text.
+
+Files containing additional content can be located anywhere on disk that is accessible to licensed.  File paths can be specified as a string or array and can contain glob values to simplify configuration inputs.  All file paths are evaluated from the [configuration root](./configuration_root.md).
+
+## Examples
+
+**Note** The examples below specify paths to additional files under the `.licenses` folder.  This is a logical place to store files containing license terms, but be careful not to store files under paths managed by licensed like `.licenses/<source type>/...`.  Running `licensed cache` in the future will delete any files under licensed managed paths that licensed did not create.  This is why the below examples use paths like `.licenses/amendments/bundler/...` instead of not `.licenses/bundler/amendments/...`.
+
+### With a string
+
+```yaml
+additional_terms:
+  # specify the type of dependency
+  bundler:
+    # specify the dependency name and path to an additional file
+    <gem-name>: .licenses/amendments/bundler/<gem-name>/terms.txt
+```
+
+### With a glob string
+
+```yaml
+additional_terms:
+  # specify the type of dependency
+  bundler:
+    # specify the dependency name and one or more additional files with a glob pattern
+    <gem-name>: .licenses/amendments/bundler/<gem-name>/*.txt
+```
+
+### With an array of strings
+
+```yaml
+additional_terms:
+  # specify the type of dependency
+  bundler:
+    # specify the dependency name and array of paths to additional files
+    <gem-name>:
+      - .licenses/amendments/bundler/<gem-name>/terms-1.txt
+      - .licenses/amendments/bundler/<gem-name>/terms-2.txt
+```
diff --git a/lib/licensed/configuration.rb b/lib/licensed/configuration.rb
index d10dbcfe..25b380ae 100644
--- a/lib/licensed/configuration.rb
+++ b/lib/licensed/configuration.rb
@@ -109,6 +109,12 @@ def allow(license)
       self["allowed"] << license
     end
 
+    # Returns an array of paths to files containing additional license terms.
+    def additional_terms_for_dependency(dependency)
+      amendment_paths = Array(self.dig("additional_terms", dependency["type"], dependency["name"]))
+      amendment_paths.flat_map { |path| Dir.glob(self.root.join(path)) }
+    end
+
     private
 
     def any_list_pattern_matched?(list, dependency, match_version: false)
diff --git a/lib/licensed/dependency.rb b/lib/licensed/dependency.rb
index c3de247f..3854c549 100644
--- a/lib/licensed/dependency.rb
+++ b/lib/licensed/dependency.rb
@@ -9,6 +9,7 @@ class Dependency < Licensee::Projects::FSProject
     attr_reader :version
     attr_reader :errors
     attr_reader :path
+    attr_reader :additional_terms
 
     # Create a new project dependency
     #
@@ -28,6 +29,7 @@ def initialize(name:, version:, path:, search_root: nil, metadata: {}, errors: [
       @errors = errors
       path = path.to_s
       @path = path
+      @additional_terms = []
 
       # enforcing absolute paths makes life much easier when determining
       # an absolute file path in #notices
@@ -80,6 +82,13 @@ def license_contents
       files.compact
     end
 
+
+    # Override the behavior of Licensee::Projects::FSProject#project_files to include
+    # additional license terms
+    def project_files
+      super + additional_license_terms_files
+    end
+
     # Returns legal notices found at the dependency path
     def notice_contents
       Dir.glob(dir_path.join("*"))
@@ -102,6 +111,7 @@ def read_file_with_encoding_check(file_path)
     def license_content_sources(files)
       paths = Array(files).map do |file|
         next file[:uri] if file[:uri]
+        next file[:source] if file[:source]
 
         path = dir_path.join(file[:dir], file[:name])
         normalize_source_path(path)
@@ -157,5 +167,22 @@ def generated_license_contents
         "text" => text
       }
     end
+
+    # Returns an array of Licensee::ProjectFiles::LicenseFile created from
+    # this dependency's additional license terms
+    def additional_license_terms_files
+      @additional_license_terms_files ||= begin
+        files = additional_terms.map do |path|
+          next unless File.file?(path)
+
+          metadata = { dir: File.dirname(path), name: File.basename(path) }
+          Licensee::ProjectFiles::LicenseFile.new(
+            load_file(metadata),
+            { source: "License terms loaded from #{metadata[:name]}" }
+          )
+        end
+        files.compact
+      end
+    end
   end
 end
diff --git a/lib/licensed/sources/source.rb b/lib/licensed/sources/source.rb
index b51fa252..ed9c8e5e 100644
--- a/lib/licensed/sources/source.rb
+++ b/lib/licensed/sources/source.rb
@@ -69,7 +69,9 @@ def enabled?
       # Returns all dependencies that should be evaluated.
       # Excludes ignored dependencies.
       def dependencies
-        cached_dependencies.reject { |d| ignored?(d) }
+        cached_dependencies
+          .reject { |d| ignored?(d) }
+          .each { |d| add_additional_terms_from_configuration(d) }
       end
 
       # Enumerate all source dependencies.  Must be implemented by each source class.
@@ -88,6 +90,11 @@ def ignored?(dependency)
       def cached_dependencies
         @dependencies ||= enumerate_dependencies.compact
       end
+
+      # Add any additional_terms for this dependency that have been added to the configuration
+      def add_additional_terms_from_configuration(dependency)
+        dependency.additional_terms.concat config.additional_terms_for_dependency("type" => self.class.type, "name" => dependency.name)
+      end
     end
   end
 end
diff --git a/test/configuration_test.rb b/test/configuration_test.rb
index ba976bb9..3c1cd930 100644
--- a/test/configuration_test.rb
+++ b/test/configuration_test.rb
@@ -604,4 +604,56 @@
                    config.cache_path
     end
   end
+
+  describe "additional_terms_for_dependency" do
+    it "returns an empty array if additional terms aren't configured for a dependency" do
+      assert_empty config.additional_terms_for_dependency("type" => "test", "name" => "test")
+    end
+
+    it "returns an array of absolute paths to amendment files for a string configuration" do
+      Dir.mktmpdir do |dir|
+        Dir.chdir dir do
+          options["additional_terms"] = { "test" => { "test" => "amendment.txt" } }
+          File.write "amendment.txt", "amendment"
+
+          path = File.join(Dir.pwd, "amendment.txt")
+          assert_equal [path], config.additional_terms_for_dependency("type" => "test", "name" => "test")
+        end
+      end
+    end
+
+    it "returns an array of absolute paths to amendment files for an array configuration" do
+      Dir.mktmpdir do |dir|
+        Dir.chdir dir do
+          options["additional_terms"] = { "test" => { "test" => ["amendment.txt"] } }
+          File.write "amendment.txt", "amendment"
+
+          path = File.join(Dir.pwd, "amendment.txt")
+          assert_equal [path], config.additional_terms_for_dependency("type" => "test", "name" => "test")
+        end
+      end
+    end
+
+    it "strips any amendment paths for files that don't exist" do
+      options["additional_terms"] = { "test" => { "test" => "amendment.txt" } }
+      assert_empty config.additional_terms_for_dependency("type" => "test", "name" => "test")
+    end
+
+    it "expands glob patterns" do
+      Dir.mktmpdir do |dir|
+        Dir.chdir dir do
+          Dir.mkdir "amendments"
+
+          options["additional_terms"] = { "test" => { "test" => "amendments/*" } }
+          paths = 2.times.map do |index|
+            path = "amendments/amendment-#{index}.txt"
+            File.write path, "amendment-#{index}"
+            File.join(Dir.pwd, path)
+          end
+
+          assert_equal paths, config.additional_terms_for_dependency("type" => "test", "name" => "test")
+        end
+      end
+    end
+  end
 end
diff --git a/test/dependency_test.rb b/test/dependency_test.rb
index eb159318..a3beadd5 100644
--- a/test/dependency_test.rb
+++ b/test/dependency_test.rb
@@ -319,4 +319,23 @@ def mkproject(&block)
       refute dep.exist?
     end
   end
+
+  describe "project_files" do
+    it "returns found only project files when the dependency does not contain additional terms" do
+      mkproject do |dependency|
+        File.write "LICENSE", Licensee::License.find("mit").text
+        assert_includes dependency.license_contents,
+                        { "sources" => "LICENSE", "text" => Licensee::License.find("mit").text }
+      end
+    end
+
+    it "returns custom license amendment files when the dependency contains additional terms" do
+      mkproject do |dependency|
+        File.write "amendment.txt", "license amendment"
+        dependency.additional_terms << "amendment.txt"
+        assert_includes dependency.license_contents,
+                        { "sources" => "License terms loaded from amendment.txt", "text" => "license amendment" }
+      end
+    end
+  end
 end
diff --git a/test/sources/source_test.rb b/test/sources/source_test.rb
index b75dd485..e8c105e6 100644
--- a/test/sources/source_test.rb
+++ b/test/sources/source_test.rb
@@ -18,5 +18,20 @@
       config.ignore("type" => "test", "name" => "dependency")
       assert_empty source.dependencies
     end
+
+    it "adds the dependency's configured additional terms to dependencies" do
+      Dir.mktmpdir do |dir|
+        Dir.chdir dir do
+          config["additional_terms"] = {
+            TestSource.type => {
+              TestSource::DEFAULT_DEPENDENCY_NAME => "amendment.txt"
+            }
+          }
+          File.write "amendment.txt", "amendment"
+          dep = source.dependencies.first
+          assert_equal [File.join(Dir.pwd, "amendment.txt")], dep.additional_terms
+        end
+      end
+    end
   end
 end