diff --git a/AuthoringToolTest/AuthoringToolTest.csproj b/AuthoringToolTest/AuthoringToolTest.csproj
index 3bade348..f8d54143 100644
--- a/AuthoringToolTest/AuthoringToolTest.csproj
+++ b/AuthoringToolTest/AuthoringToolTest.csproj
@@ -25,7 +25,7 @@
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+        <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="21.0.22" />
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diff --git a/BackendAccessTest/BackendAccessTest.csproj b/BackendAccessTest/BackendAccessTest.csproj
index 78d8e73a..59ddf4e6 100644
--- a/BackendAccessTest/BackendAccessTest.csproj
+++ b/BackendAccessTest/BackendAccessTest.csproj
@@ -22,7 +22,7 @@
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-        <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="19.2.87" />
+        <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="21.0.22" />
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diff --git a/BusinessLogicTest/BusinessLogicTest.csproj b/BusinessLogicTest/BusinessLogicTest.csproj
index 7d7ec0d5..f420add9 100644
--- a/BusinessLogicTest/BusinessLogicTest.csproj
+++ b/BusinessLogicTest/BusinessLogicTest.csproj
@@ -22,7 +22,7 @@
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+        <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="21.0.22" />
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diff --git a/DataAccessTest/DataAccessTest.csproj b/DataAccessTest/DataAccessTest.csproj
index 9bfa35c2..1d560bbd 100644
--- a/DataAccessTest/DataAccessTest.csproj
+++ b/DataAccessTest/DataAccessTest.csproj
@@ -22,7 +22,7 @@
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diff --git a/GeneratorTest/GeneratorTest.csproj b/GeneratorTest/GeneratorTest.csproj
index 5701cb50..69cd04dd 100644
--- a/GeneratorTest/GeneratorTest.csproj
+++ b/GeneratorTest/GeneratorTest.csproj
@@ -19,7 +19,7 @@
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-        <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="19.2.87" />
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diff --git a/IntegrationTest/IntegrationTest.csproj b/IntegrationTest/IntegrationTest.csproj
index b9619985..566c0b12 100644
--- a/IntegrationTest/IntegrationTest.csproj
+++ b/IntegrationTest/IntegrationTest.csproj
@@ -20,7 +20,7 @@
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-        <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="19.2.87" />
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diff --git a/PresentationTest/PresentationTest.csproj b/PresentationTest/PresentationTest.csproj
index 0ced8a66..2b86f04e 100644
--- a/PresentationTest/PresentationTest.csproj
+++ b/PresentationTest/PresentationTest.csproj
@@ -26,7 +26,7 @@
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-        <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="19.2.87" />
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diff --git a/SharedTest/SharedTest.csproj b/SharedTest/SharedTest.csproj
index fdc183b0..9a4fe9b4 100644
--- a/SharedTest/SharedTest.csproj
+++ b/SharedTest/SharedTest.csproj
@@ -21,7 +21,7 @@
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-        <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="19.2.87" />
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diff --git a/TestHelpers/TestHelpers.csproj b/TestHelpers/TestHelpers.csproj
index 4f1f96ef..2cf0d6bc 100644
--- a/TestHelpers/TestHelpers.csproj
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-      <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="19.2.87" />
+      <PackageReference Include="TestableIO.System.IO.Abstractions.TestingHelpers" Version="21.0.22" />
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