diff --git a/python/python-psi-impl/src/com/jetbrains/python/packaging/PyRequirementParser.java b/python/python-psi-impl/src/com/jetbrains/python/packaging/PyRequirementParser.java
index 9b3e9735b989..6ad1ea797b9d 100644
--- a/python/python-psi-impl/src/com/jetbrains/python/packaging/PyRequirementParser.java
+++ b/python/python-psi-impl/src/com/jetbrains/python/packaging/PyRequirementParser.java
@@ -8,6 +8,7 @@ import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.LocalFileSystem;
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.util.concurrency.annotations.RequiresReadLock;
 import com.jetbrains.python.packaging.requirement.PyRequirementRelation;
 import com.jetbrains.python.packaging.requirement.PyRequirementVersionSpec;
 import one.util.streamex.StreamEx;
@@ -194,6 +195,8 @@ public final class PyRequirementParser {
     return fromText(text, null, new HashSet<>());
   }
 
+  @RequiresReadLock(generateAssertion = false)
+
   public static @NotNull List<PyRequirement> fromFile(@NotNull VirtualFile file) {
     return fromText(loadText(file), file, new HashSet<>());
   }
@@ -221,6 +224,8 @@ public final class PyRequirementParser {
     return null;
   }
 
+  @RequiresReadLock(generateAssertion = false)
+
   private static @Nullable PyRequirement parseVcsProjectUrl(@NotNull String line) {
     final Matcher vcsMatcher = VCS_PROJECT_URL.matcher(line);
     if (vcsMatcher.matches()) {
@@ -259,8 +264,12 @@ public final class PyRequirementParser {
     return null;
   }
 
+  @RequiresReadLock(generateAssertion = false)
+
   @ApiStatus.Internal
-  public static @NotNull List<PyRequirement> fromText(@NotNull String text, @Nullable VirtualFile containingFile, @NotNull Set<VirtualFile> visitedFiles) {
+  public static @NotNull List<PyRequirement> fromText(@NotNull String text,
+                                                      @Nullable VirtualFile containingFile,
+                                                      @NotNull Set<VirtualFile> visitedFiles) {
     if (containingFile != null) {
       visitedFiles.add(containingFile);
     }
@@ -273,6 +282,7 @@ public final class PyRequirementParser {
       .toList();
   }
 
+  @RequiresReadLock(generateAssertion = false)
   private static @NotNull String loadText(@NotNull VirtualFile file) {
     final Document document = FileDocumentManager.getInstance().getDocument(file);
 
@@ -312,6 +322,8 @@ public final class PyRequirementParser {
     return Pair.create(normalizeVcsOrArchiveNameParts(nameParts), normalizeVcsOrArchiveVersionParts(versionParts));
   }
 
+  @RequiresReadLock(generateAssertion = false)
+
   private static @NotNull PyRequirement createVcsOrArchiveRequirement(@NotNull Pair<String, String> nameAndVersion,
                                                                       @NotNull List<String> installOptions,
                                                                       @Nullable String extras) {
@@ -399,6 +411,8 @@ public final class PyRequirementParser {
     return result;
   }
 
+  @RequiresReadLock(generateAssertion = false)
+
   private static @NotNull List<PyRequirement> parseLine(@NotNull String line,
                                                         @Nullable VirtualFile containingFile,
                                                         @NotNull Set<VirtualFile> visitedFiles) {
@@ -533,6 +547,8 @@ public final class PyRequirementParser {
     return null;
   }
 
+  @RequiresReadLock(generateAssertion = false)
+
   private static @NotNull List<PyRequirement> parseRecursiveLine(@NotNull String line,
                                                                  @Nullable VirtualFile containingFile,
                                                                  @NotNull Set<VirtualFile> visitedFiles,
diff --git a/python/src/com/jetbrains/python/packaging/PyPackageManagerImplBase.java b/python/src/com/jetbrains/python/packaging/PyPackageManagerImplBase.java
index b6fbed2c063a..e02f628e4374 100644
--- a/python/src/com/jetbrains/python/packaging/PyPackageManagerImplBase.java
+++ b/python/src/com/jetbrains/python/packaging/PyPackageManagerImplBase.java
@@ -11,6 +11,7 @@ import com.intellij.openapi.roots.OrderRootType;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.VfsUtil;
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.util.concurrency.annotations.RequiresReadLock;
 import com.intellij.util.net.HttpConfigurable;
 import com.jetbrains.python.PyPsiPackageUtil;
 import com.jetbrains.python.PySdkBundle;
@@ -167,6 +168,7 @@ public abstract class PyPackageManagerImplBase extends PyPackageManager {
     return dependents;
   }
 
+  @RequiresReadLock(generateAssertion = false)
   protected static @NotNull LanguageLevel getOrRequestLanguageLevelForSdk(@NotNull Sdk sdk) throws ExecutionException {
     if (sdk instanceof PyDetectedSdk) {
       final PythonSdkFlavor flavor = PythonSdkFlavor.getFlavor(sdk);
diff --git a/python/src/com/jetbrains/python/packaging/PyPackageUtil.java b/python/src/com/jetbrains/python/packaging/PyPackageUtil.java
index 5b8eb239ce09..5d16f298fdeb 100644
--- a/python/src/com/jetbrains/python/packaging/PyPackageUtil.java
+++ b/python/src/com/jetbrains/python/packaging/PyPackageUtil.java
@@ -33,6 +33,7 @@ import com.intellij.psi.PsiManager;
 import com.intellij.psi.ResolveResult;
 import com.intellij.serviceContainer.AlreadyDisposedException;
 import com.intellij.util.ObjectUtils;
+import com.intellij.util.concurrency.annotations.RequiresReadLock;
 import com.intellij.util.containers.ContainerUtil;
 import com.jetbrains.python.PyBundle;
 import com.jetbrains.python.PyNames;
@@ -419,6 +420,7 @@ public final class PyPackageUtil {
            PyPsiPackageUtil.findPackage(packages, PIP) != null;
   }
 
+  @RequiresReadLock(generateAssertion = false)
   public static @Nullable List<PyRequirement> getRequirementsFromTxt(@NotNull Module module) {
     final VirtualFile requirementsTxt = findRequirementsTxt(module);
     if (requirementsTxt != null) {